P0455
EVAP system large leak detected
Severity: Monitor
OBD2 code list
Every code we've reviewed, grouped by the system that sets it.
EVAP (evaporative emissions)
The EVAP system traps gasoline vapor from the fuel tank in a charcoal canister and later lets the engine draw that vapor in and burn it, a process called purging.
P0442
EVAP system small leak detected
Severity: MonitorP0456
EVAP system very small leak detected
Severity: MonitorP0441
EVAP purge flow incorrect
Severity: MonitorP0446
EVAP vent control performance problem
Severity: MonitorP0449
EVAP vent valve circuit fault
Severity: MonitorP0496
EVAP purge flow when purge should be off
Severity: MonitorP0440
EVAP system fault (general)
Severity: MonitorP0443
EVAP purge valve circuit fault
Severity: MonitorP0451
Fuel tank pressure sensor reading out of its expected range
Severity: MonitorP0457
EVAP leak detected from the fuel cap being loose or off
Severity: MonitorP0497
EVAP system low purge flow
Severity: MonitorP1450
Fuel tank vacuum not bleeding off (Ford, Lincoln, Mazda)
Severity: MonitorP144A
On Ford vehicles, the EVAP system's purge vapor line is restricted or blocked
Severity: MonitorP2402
EVAP leak detection pump control circuit high
Severity: MonitorP043E
EVAP reference orifice flow too low
Severity: MonitorP0452
EVAP pressure sensor reading too low
Severity: MonitorP2401
Leak detection pump circuit reading low
Severity: MonitorP2419
EVAP switching valve circuit reading low
Severity: MonitorP043F
EVAP leak-test reference check reads too much flow
Severity: MonitorP0445
EVAP purge valve circuit shorted
Severity: MonitorP0448
EVAP vent valve circuit shorted
Severity: MonitorP144C
On Ford vehicles, the EVAP purge check valve or vapor ejector path is not performing
Severity: MonitorP2422
EVAP vent valve will not open, so fresh air cannot get into the fuel vapour system
Severity: MonitorP04F0
EVAP purge flow is not as expected when the engine is under high load (purge line A)
Severity: MonitorP1456
Honda: leak found in the EVAP control system on the fuel tank side
Severity: MonitorP2450
EVAP switching valve (fuel tank isolation valve) not working as commanded
Severity: MonitorP1446
Nissan EVAP canister vent control valve fault (valve closed)
Severity: Severity not verifiedP0444
The computer sees an open circuit on the EVAP purge control valve
Severity: Severity not verifiedP0447
EVAP vent control circuit is open (no proper signal from the vent valve circuit)
Severity: MonitorP0450
EVAP pressure sensor malfunction
Severity: MonitorP0453
The evaporative system pressure sensor is sending a voltage that is too high
Severity: MonitorP0458
The computer sees a low voltage on the EVAP purge control valve circuit
Severity: Severity not verifiedP0468
EVAP purge flow sensor signal reading too high
Severity: Severity not verifiedP0469
EVAP purge flow sensor signal dropping in and out
Severity: Severity not verifiedP0498
EVAP vent valve control circuit low: the wire to the valve that seals the fuel vapour system is reading too low
Severity: MonitorP0499
EVAP vent valve control circuit high: the wire to the valve that seals the fuel vapour system is reading too high
Severity: MonitorP04F1
EVAP system low purge flow: the computer sees less fuel vapour moving from the charcoal canister to the engine than expected
Severity: Severity not verifiedP1457
On Honda and Acura, the engine computer found a leak or fault in the EVAP canister side of the fuel vapor system
Severity: MonitorP2421
The EVAP vent valve is reported stuck open
Severity: MonitorP0454
Evaporative emission control system pressure sensor signal is intermittent
Severity: Severity not verified
Catalytic converter (catalyst efficiency)
The catalytic converter cleans exhaust by converting harmful gases into less harmful ones.
P0420
Catalytic converter efficiency below the computer's limit (Bank 1)
Severity: MonitorP0430
Catalytic converter efficiency below the computer's limit (Bank 2)
Severity: MonitorP0421
Warm-up catalytic converter not cleaning well enough
Severity: MonitorP0422
Main catalytic converter not cleaning exhaust well enough
Severity: MonitorP0423
Heated catalytic converter efficiency below the computer's limit (Bank 1)
Severity: Severity not verifiedP0424
Heated catalytic converter not reaching its expected temperature (Bank 1)
Severity: Severity not verifiedP0431
Bank 2 catalytic converter warm-up efficiency is below the limit
Severity: MonitorP0432
Main catalytic converter efficiency below the computer's limit (Bank 2)
Severity: Severity not verifiedP0433
Heated catalytic converter efficiency below the computer's limit (Bank 2)
Severity: Severity not verifiedP0434
Heated catalytic converter not reaching its expected temperature (Bank 2)
Severity: Severity not verified
Fuel trim (air-fuel mixture)
The engine computer constantly adjusts how much fuel it injects, using oxygen sensor feedback, to keep the air-fuel mixture correct.
P0171
Engine computer has reached its limit adding fuel on bank 1: the mixture is lean
Severity: MonitorP0174
Engine computer has reached its limit adding fuel on bank 2: the mixture is lean
Severity: MonitorP0172
Engine computer has reached its limit removing fuel on bank 1: the mixture is rich
Severity: MonitorP0175
Engine computer has reached its limit removing fuel on bank 2: the mixture is rich
Severity: MonitorP219A
The engine computer has detected that the cylinders on bank 1 are running at noticeably different air-fuel ratios from each other
Severity: Inspect soonP2096
The engine computer has had to add fuel based on the downstream oxygen sensor because the exhaust after the catalytic converter reads lean on bank 1
Severity: MonitorP219B
The engine computer has detected that one or more cylinders on bank 2 are running a noticeably different air-fuel mixture from the others
Severity: Inspect soonP2097
The engine computer has had to take fuel away based on the downstream oxygen sensor because the exhaust after the catalytic converter reads rich on bank 1
Severity: MonitorP219F
Cylinder 4 is running at a noticeably different air-fuel ratio from the other cylinders, so the computer flags an imbalance on that cylinder
Severity: Inspect soonP04DB
The computer believes the crankcase ventilation system has come apart, so crankcase pressure is not behaving as it should
Severity: MonitorP2099
The engine computer sees a rich mixture on bank 2 from the sensor behind the catalytic converter and the fuel trim cannot correct it
Severity: MonitorP219C
The engine computer has detected that cylinder 1 is running at a noticeably different air-fuel ratio from the other cylinders
Severity: Severity not verifiedP219D
The engine computer has detected that cylinder 2 is running at a noticeably different air-fuel ratio from the other cylinders
Severity: Severity not verifiedP0170
Bank 1 fuel trim has gone out of range
Severity: MonitorP1174
On Chevrolet and Saturn, fuel trim shows a cylinder balance problem on bank 1
Severity: Severity not verifiedP219E
Cylinder 3 air-fuel ratio imbalance
Severity: Severity not verifiedP2191
Fuel mixture too lean at higher load (bank 1)
Severity: Severity not verifiedP04FB
Crankcase ventilation pressure sensor reading does not make sense
Severity: Severity not verifiedP0173
Fuel trim at its limit on bank 2
Severity: Severity not verifiedP2177
Engine computer sees a lean mixture on bank 1 off idle (while cruising or at light throttle): too much air for the fuel being delivered
Severity: MonitorP2187
Engine computer sees a lean mixture on bank 1 at idle: too much air for the fuel being delivered
Severity: MonitorP2C90
Crankcase ventilation hose A disconnected
Severity: Inspect soon
Misfire
A misfire is a cylinder firing stroke that does not burn its fuel properly.
P0300
Random or multiple-cylinder misfire detected
Severity: Inspect soonP0301
Misfire detected in cylinder 1
Severity: Inspect soonP0302
Misfire detected in cylinder 2
Severity: Inspect soonP0303
Misfire detected in cylinder 3
Severity: Inspect soonP0304
Misfire detected in cylinder 4
Severity: Inspect soonP0305
Misfire detected in cylinder 5
Severity: Inspect soonP0306
Misfire detected in cylinder 6
Severity: Inspect soonP0316
A misfire was detected during the first 1,000 engine revolutions after start-up
Severity: Inspect soonP0307
Misfire detected in cylinder 7
Severity: Inspect soonP0308
Misfire detected in cylinder 8
Severity: Inspect soonP1399
On Honda and Acura, a random misfire that the computer cannot pin on one cylinder
Severity: Severity not verifiedP0309
Misfire detected in cylinder 9
Severity: Severity not verifiedP0311
Misfire detected on cylinder 11
Severity: Inspect soonP0312
Misfire detected on cylinder 12
Severity: Inspect soon
Variable valve timing (VVT)
Variable valve timing lets the engine computer shift camshaft timing while driving, using engine oil pressure routed through a control solenoid to a phaser on the camshaft.
P0011
Intake camshaft timing ahead of target or slow to respond (bank 1)
Severity: Inspect soonP0014
Exhaust camshaft timing ahead of target or slow to respond (bank 1)
Severity: Inspect soonP0016
Crankshaft and intake camshaft positions do not agree (bank 1, sensor A)
Severity: Inspect soonP0017
Crankshaft and exhaust camshaft positions do not agree (bank 1, sensor B)
Severity: Inspect soonP0012
Intake camshaft timing behind target (bank 1)
Severity: Inspect soonP0010
Intake camshaft actuator (VVT solenoid) circuit fault, bank 1
Severity: Inspect soonP0008
Engine position system performance, bank 1: the crankshaft-to-camshaft timing relationship has drifted out of range
Severity: Inspect soonP0018
Crankshaft and camshaft positions do not agree on bank 2, sensor A
Severity: Inspect soonP0021
Bank 2 'A' camshaft (usually intake) timing is more advanced than commanded, or the system is not performing
Severity: Inspect soonP0024
Bank 2 'B' camshaft (usually exhaust) timing is more advanced than commanded, or the system is not performing
Severity: Inspect soonP000A
Intake camshaft position slow response, bank 1: the bank 1 intake camshaft takes too long to reach the timing the engine computer commands
Severity: Inspect soonP0013
Exhaust camshaft timing solenoid circuit, bank 1: the engine computer sees an open or faulty circuit to the bank 1 exhaust cam timing solenoid
Severity: Inspect soonP0019
Crankshaft-to-camshaft correlation, bank 2 camshaft B: the bank 2 exhaust camshaft signal is out of step with the crankshaft
Severity: Inspect soonP0022
Intake camshaft timing over-retarded, bank 2: the bank 2 intake camshaft is sitting later than the engine computer commanded
Severity: Inspect soonP3400
Cylinder deactivation system, bank 1: the engine computer sees the hardware that shuts off cylinders on bank 1 not doing what it was told
Severity: Inspect soonP3497
Cylinder deactivation system, bank 2: the engine computer sees the hardware that shuts off cylinders on bank 2 not doing what it was told
Severity: Inspect soonP000B
Exhaust camshaft slow to respond to the computer (bank 1)
Severity: Inspect soonP1061
Jeep: cylinder 1 oil supply solenoid valve stuck
Severity: Inspect soonP2646
Variable valve rocker arm not working as commanded (bank 1)
Severity: Inspect soonP0009
Engine position system performance, bank 2: the crankshaft and bank 2 camshaft timing no longer agree
Severity: Inspect soonP0015
Exhaust camshaft timing too far behind its target (bank 1)
Severity: MonitorP000D
The 'B' camshaft on bank 2 is slow to reach the timing position the engine computer commands
Severity: Inspect soonP000C
Bank 2 intake camshaft slow to reach the position the computer commanded
Severity: Severity not verifiedP0020
Bank 2 intake camshaft position actuator circuit fault
Severity: Inspect soonP0025
Bank 2 exhaust camshaft timing too far retarded
Severity: Severity not verifiedP2645
The engine computer sees an open circuit in the rocker arm actuator A (bank 1)
Severity: Severity not verifiedP2652
Rocker arm oil pressure switch B (bank 1) fault, as Honda describes it
Severity: Inspect soon
Air metering (MAF, MAP and intake air temperature)
The engine computer needs to know how much air the engine is taking in to calculate how much fuel to inject.
P0101
Airflow sensor reading doesn't match what the engine computer expects for the throttle opening
Severity: Inspect soonP0102
The airflow sensor's signal is lower than the engine computer will accept
Severity: Inspect soonP0113
The intake air temperature signal is stuck at a reading colder than any real air could be
Severity: MonitorP0106
Manifold pressure (MAP) sensor reading doesn't match what the engine computer expects
Severity: Inspect soonP1101
On GM and GM-era Saab engines, the airflow worked out from throttle position doesn't match the airflow measured by the MAF and MAP sensors
Severity: Inspect soonP0108
The manifold pressure (MAP) sensor is sending a voltage that stays too high for the engine load
Severity: MonitorP0100
Mass or volume air flow sensor circuit fault
Severity: MonitorP0107
Manifold pressure or barometric pressure sensor signal too low
Severity: MonitorP0097
Intake air temperature sensor 2 circuit signal too low
Severity: Inspect soonP0103
The mass airflow sensor is reporting a signal that stays too high
Severity: MonitorP0104
The mass airflow sensor signal drops out or comes and goes
Severity: MonitorP0105
Manifold pressure / barometric pressure sensor signal is abnormal
Severity: Inspect soonP0111
The intake air temperature reading does not agree with what other sensors suggest
Severity: MonitorP0112
The intake air temperature sensor signal reads too low in voltage, which the computer interprets as extremely hot intake air
Severity: Severity not verifiedP0114
The intake air temperature signal comes and goes
Severity: MonitorP0129
Barometric pressure reading lower than the engine computer expects
Severity: Severity not verifiedP2074
The computer sees the intake manifold pressure and throttle position disagree in a way that points to too much air or a vacuum leak
Severity: Severity not verifiedP2227
The engine computer sees a barometric pressure reading that does not fit the engine load and throttle opening
Severity: Inspect soon
Oxygen sensors
Oxygen sensors measure leftover oxygen in the exhaust.
P0135
The heater in the upstream oxygen sensor on bank 1 isn't working as the computer expects
Severity: MonitorP0141
The heater in the downstream oxygen sensor on bank 1 isn't working as the computer expects
Severity: MonitorP0138
The downstream oxygen sensor on bank 1 is reporting a voltage that stays too high
Severity: MonitorP0137
The downstream oxygen sensor on bank 1 is reporting a voltage that stays too low
Severity: MonitorP0031
The heater control circuit for the upstream oxygen sensor on bank 1 is reading too low
Severity: MonitorP0037
The heater control circuit for the downstream oxygen sensor on bank 1 is reading too low
Severity: MonitorP0131
The engine computer sees a voltage that is too low on the upstream oxygen sensor circuit for bank 1
Severity: MonitorP2196
The upstream oxygen or air-fuel sensor on bank 1 has been reporting a rich mixture for too long, beyond what the engine computer expects
Severity: Inspect soonP0030
Oxygen sensor heater circuit fault on bank 1 sensor 1
Severity: MonitorP0133
Upstream oxygen sensor on bank 1 reacts too slowly
Severity: Severity not verifiedP0140
The oxygen sensor behind the catalytic converter on bank 1 is not sending a signal the computer can use
Severity: MonitorP2195
The upstream oxygen or air-fuel sensor on bank 1 reports a mixture that looks stuck lean or not believable
Severity: Inspect soonP0161
Oxygen sensor heater circuit fault, bank 2 sensor 2
Severity: MonitorP0036
A fault in the heater control circuit of the downstream oxygen sensor on bank 1
Severity: MonitorP0132
Front oxygen sensor signal too high (bank 1, sensor 1)
Severity: MonitorP0136
Rear oxygen sensor circuit fault (bank 1, sensor 2)
Severity: MonitorP015B
Front oxygen sensor slow to respond, lean to rich (bank 1, sensor 1)
Severity: MonitorP2A00
Front air-fuel sensor signal out of range (bank 1, sensor 1)
Severity: Severity not verifiedP0130
The upstream oxygen sensor on bank 1 is sending a signal the computer judges to be wrong
Severity: Severity not verifiedP0134
The upstream oxygen sensor on bank 1 is giving the computer no signal activity
Severity: Severity not verifiedP0139
The rear oxygen sensor on bank 1 reacts too slowly to changes in the exhaust
Severity: MonitorP0142
The bank 1 sensor 3 oxygen sensor circuit is giving the computer a signal outside what it expects
Severity: Severity not verifiedP0143
The bank 1 sensor 3 oxygen sensor is reporting a voltage that is too low
Severity: Severity not verifiedP0144
The bank 1 sensor 3 oxygen sensor is reporting a voltage that is too high
Severity: Severity not verifiedP0145
The oxygen sensor farthest downstream on bank 1 (sensor 3) is responding too slowly
Severity: MonitorP0146
The computer sees no signal from the oxygen sensor farthest downstream on bank 1 (sensor 3)
Severity: MonitorP0147
The heater in the oxygen sensor farthest downstream on bank 1 (sensor 3) is not working as the computer expects
Severity: MonitorP0150
Oxygen sensor circuit fault on the bank 2 upstream sensor
Severity: Severity not verifiedP0151
Bank 2 sensor 1 oxygen sensor signal is lower than the sensor can normally produce
Severity: MonitorP0152
The upstream oxygen sensor on bank 2 is sending a voltage higher than the computer thinks is possible
Severity: Severity not verifiedP0153
The upstream oxygen sensor on bank 2 is slow to react to changes in the exhaust
Severity: MonitorP0154
Bank 2 upstream oxygen sensor not responding
Severity: Severity not verifiedP0155
Heater circuit fault on the upstream oxygen sensor on the second bank of cylinders (bank 2, sensor 1)
Severity: MonitorP0156
The oxygen sensor after the catalytic converter on bank 2 (sensor 2) has a circuit fault
Severity: MonitorP0157
The oxygen sensor after the catalytic converter on bank 2 (sensor 2) is sending a signal voltage that is too low
Severity: MonitorP0158
Oxygen sensor signal voltage reads too high, bank 2 sensor 2
Severity: MonitorP0159
Oxygen sensor responding too slowly, bank 2 sensor 2
Severity: MonitorP0160
Oxygen sensor shows no activity, bank 2 sensor 2
Severity: MonitorP0163
Oxygen sensor signal voltage reads too low, bank 2 sensor 3
Severity: MonitorP0164
Bank 2 sensor 3 oxygen sensor signal is higher than the computer expects
Severity: MonitorP2197
The upstream oxygen or air-fuel sensor on bank 2 is stuck reading lean, or its signal does not make sense
Severity: Inspect soonP0166
Downstream oxygen sensor on bank 2 (sensor 3) is sending no signal activity to the engine computer
Severity: Inspect soon
Engine cooling (thermostat)
The thermostat keeps the engine cold-running time short by holding coolant in the engine until it warms up, then opening to keep it at a steady temperature.
P0128
Engine coolant stays below thermostat temperature
Severity: MonitorP0125
Coolant too cold for closed-loop fuel control
Severity: MonitorP0118
Engine coolant temperature sensor circuit high
Severity: Severity not verifiedP0217
The engine computer has detected an engine over-temperature condition
Severity: StopP1285
Cylinder head temperature above the engine computer’s limit (Ford, Lincoln, Ford-built Mazda)
Severity: StopP1299
Ford and Lincoln: cylinder head over-temperature protection is active (the engine computer's fail-safe cooling mode)
Severity: StopP2681
Engine coolant bypass valve A control circuit open or out of range
Severity: Inspect soonP26A3
Engine coolant bypass valve A range or performance problem
Severity: Inspect soonP26B7
Engine coolant bypass valve C control circuit open
Severity: Inspect soonP0481
Cooling fan 2 control circuit fault
Severity: Inspect soonP26CB
Electric engine coolant pump not performing as commanded, or stuck off
Severity: Inspect soonP0126
Engine not reaching a steady operating temperature
Severity: MonitorP0196
Engine oil temperature reading does not make sense
Severity: Inspect soonP0597
Thermostat heater circuit open
Severity: Inspect soonP2181
Cooling system not holding its expected temperature
Severity: Inspect soonP2600
Coolant pump control circuit open
Severity: Inspect soonP2682
Coolant bypass valve control circuit low
Severity: Inspect soonP01F0
Coolant temperature fell back below the temperature the computer needs for its diagnostics
Severity: MonitorP059F
Active grille air shutter system fault: the movable shutters behind the grille are not moving or reporting as expected
Severity: Inspect soonP2601
Electric coolant pump control circuit fault or poor pump performance
Severity: Inspect soonP0117
Engine coolant temperature sensor circuit reads too low (shorted toward ground)
Severity: MonitorP011A
The two engine coolant temperature sensors disagree with each other
Severity: MonitorP0480
Cooling fan 1 control circuit fault: the computer commanded the fan and did not see the expected response
Severity: Inspect soonP0598
Thermostat heater control circuit low: the computer sees too little voltage in the circuit of an electrically heated thermostat
Severity: Severity not verifiedP05A0
Active grille shutter stuck or out of position: the motorised shutters in front of the radiator are not reaching their commanded angle
Severity: MonitorP111A
On Mazda, the engine coolant temperature has gone above its limit
Severity: Inspect soonP26AB
Engine coolant bypass valve stuck: the valve that steers coolant to the heater core is not moving as commanded
Severity: MonitorP1217
Engine over-temperature condition on Nissan (a cooling system fault, not a transmission fault)
Severity: Severity not verifiedP26A5
Engine coolant bypass valve position sensor range or performance fault
Severity: Severity not verifiedP26A6
Engine coolant bypass valve A: the valve position sensor reads too low
Severity: Severity not verifiedP00B7
Coolant flow through the engine cooling system lower than the computer expects
Severity: Severity not verifiedP0115
The engine computer sees a signal from the coolant temperature sensor circuit that is outside the expected range
Severity: Inspect soonP0116
The engine coolant temperature reading does not make sense for how the engine is running
Severity: MonitorP0119
Engine coolant temperature sensor signal that drops out or jumps erratically
Severity: Severity not verifiedP0195
The engine computer found a fault in the engine oil temperature sensor circuit.
Severity: Severity not verifiedP0482
The control circuit for the third cooling fan has a fault
Severity: Severity not verifiedP0495
The cooling fan is running faster than the computer expects
Severity: Inspect soonP0599
Thermostat heater control circuit voltage too high
Severity: Severity not verifiedP2560
The computer decided the engine coolant level is low
Severity: Severity not verifiedP2602
Coolant pump control circuit low voltage
Severity: Inspect soonP261F
Coolant pump A control circuit stuck on
Severity: Inspect soon
Transmission
On many vehicles a separate transmission control module manages shifting and stores its own detailed fault codes.
P0700
Transmission module requests the check engine light
Severity: Inspect soonP0741
Torque converter clutch not engaging as commanded
Severity: Inspect soonP0705
Fault in the transmission range sensor circuit (gear selector position input)
Severity: Inspect soonP0706
Transmission range sensor signal out of range or not plausible
Severity: Inspect soonP0707
Transmission range sensor circuit signal too low
Severity: Inspect soonP0711
Transmission fluid temperature reading does not make sense
Severity: Inspect soonP0717
No signal from the transmission input or turbine speed sensor
Severity: Inspect soonP0720
Transmission output shaft speed sensor circuit fault
Severity: Inspect soonP0722
No signal from the transmission output shaft speed sensor
Severity: Inspect soonP0730
Transmission gear ratio does not match the selected gear
Severity: Inspect soonP0731
Transmission computer sees the wrong speed ratio in first gear
Severity: Inspect soonP0732
Transmission computer sees the wrong speed ratio in second gear
Severity: Inspect soonP0733
Transmission computer sees the wrong speed ratio in third gear
Severity: Inspect soonP0734
Transmission computer sees the wrong speed ratio in fourth gear
Severity: Inspect soonP0740
Torque converter clutch control circuit fault
Severity: Inspect soonP0744
Torque converter clutch control signal dropping in and out
Severity: Inspect soonP0746
Pressure control solenoid A is not working or stuck off
Severity: Inspect soonP0747
Pressure control solenoid A stuck on
Severity: Inspect soonP0776
Pressure control solenoid B not working as expected or stuck off
Severity: Inspect soonP0780
Transmission did not complete a shift the way the computer expected
Severity: Inspect soonP0841
Transmission fluid pressure sensor or switch reading does not make sense
Severity: Inspect soonP0868
Transmission computer sees fluid pressure lower than it should be
Severity: Inspect soonP1778
Manufacturer-specific code. On Nissan CVTs: step motor function, the actual pulley ratio not following the step motor command
Severity: Inspect soonP2714
Pressure control solenoid D is not working or stuck off
Severity: Inspect soonP2716
Electrical fault in the pressure control solenoid D circuit
Severity: Inspect soonP0715
Transmission input or turbine shaft speed sensor circuit fault
Severity: Inspect soonP0716
Input or turbine speed sensor signal out of range
Severity: Inspect soonP0721
Transmission output shaft speed sensor signal out of its expected range
Severity: Inspect soonP0725
Engine speed signal to the transmission computer is missing or faulty
Severity: Inspect soonP0750
Shift solenoid A circuit malfunction
Severity: Inspect soonP0755
Shift solenoid B circuit or operation fault
Severity: Inspect soonP0777
Pressure control solenoid B stuck on
Severity: Inspect soonP0796
Pressure control solenoid C not performing as commanded or stuck off
Severity: Inspect soonP07A3
Transmission clutch (friction element) A stuck applied
Severity: Inspect soonP07F7
Tenth gear ratio does not match what the computer expects
Severity: Inspect soonP090C
Clutch B actuator control circuit voltage low
Severity: Inspect soonP1702
Ford: transmission range sensor circuit intermittent
Severity: Inspect soonP1740
Lock-up or overdrive solenoid performance (Dodge) or 4th clutch pressure switch fault (Honda)
Severity: Inspect soonP1744
Torque converter clutch slipping or not working as expected (Ford, Lincoln, Mercury, Mazda)
Severity: Inspect soonP17F0
Nissan: CVT judder detected, transmission (T/M) inspection needed
Severity: Inspect soonP17F1
Nissan: CVT judder detected, control unit (C/U) inspection needed
Severity: Inspect soonP1870
GM: transmission component slipping, usually at the torque converter clutch
Severity: Inspect soonP1921
Transmission range signal out of range or implausible (Ford)
Severity: Severity not verifiedP2757
Torque converter clutch pressure control solenoid performance or stuck off
Severity: Inspect soonP0735
Gear 5 incorrect ratio
Severity: Inspect soonP0751
Shift solenoid A performance or stuck off
Severity: Inspect soonP0752
Shift solenoid A stuck on
Severity: Inspect soonP0758
Shift solenoid B electrical fault
Severity: Inspect soonP0775
Pressure control solenoid B malfunction
Severity: Inspect soonP0884
Transmission control module power input signal intermittent
Severity: Inspect soonP0887
Transmission control module power relay control circuit high
Severity: Inspect soonP0965
Pressure control solenoid B control circuit range/performance
Severity: Inspect soonP1811
On GM vehicles (Chevrolet, Buick, Saturn): maximum adapt and long shift
Severity: Inspect soonP2764
Torque converter clutch pressure control solenoid control circuit low
Severity: Inspect soonP2872
Clutch A stuck engaged
Severity: Inspect soonP0745
Pressure control solenoid A electrical or stuck-off fault
Severity: Inspect soonP0756
Shift solenoid B stuck off or performing poorly
Severity: Inspect soonP07A5
Transmission friction element B stuck on
Severity: Inspect soonP07E6
Stuck in Park detected
Severity: Severity not verifiedP084A
Transmission fluid pressure sensor or switch H circuit fault
Severity: Inspect soonP0871
Transmission fluid pressure sensor or switch C reading out of range
Severity: Inspect soonP0944
Transmission hydraulic pressure lost
Severity: Inspect soonP1DF3
ECU not initialized (Ram)
Severity: Severity not verifiedP2701
Transmission friction element B apply time out of range
Severity: Inspect soonP2704
Transmission friction element E apply time out of range
Severity: Inspect soonP0701
Transmission control system range or performance problem
Severity: Inspect soonP0753
Shift solenoid A electrical fault
Severity: Inspect soonP076F
Gear 7 incorrect ratio
Severity: Inspect soonP0770
Shift solenoid E malfunction
Severity: Inspect soonP0826
Up and down shift switch circuit fault
Severity: Inspect soonP083B
Transmission fluid pressure sensor or switch G range or performance
Severity: Inspect soonP2703
Transmission friction element D apply time range or performance
Severity: Inspect soonP2715
Pressure control solenoid D stuck on
Severity: Inspect soonP2732
Pressure control solenoid F performance or stuck off
Severity: Inspect soonP2832
Shift fork A position circuit range or performance
Severity: Inspect soonP2837
Shift fork B position circuit range or performance
Severity: Inspect soonP0218
Transmission fluid temperature too high
Severity: Inspect soonP0729
Gear 6 incorrect ratio
Severity: Inspect soonP0736
Reverse gear ratio is wrong
Severity: Inspect soonP073E
Transmission unable to engage reverse
Severity: Inspect soonP0742
Torque converter clutch stuck on
Severity: Inspect soonP0760
Shift solenoid C performance or stuck
Severity: Inspect soonP0766
Shift solenoid D performance or stuck off
Severity: Inspect soonP0792
Intermediate shaft speed sensor signal out of range
Severity: Inspect soonP0805
Clutch position sensor circuit
Severity: MonitorP0845
Transmission fluid pressure sensor/switch B circuit fault
Severity: Inspect soonP0846
Transmission fluid pressure sensor/switch B range or performance
Severity: Inspect soonP0850
Park/neutral switch input circuit fault
Severity: Inspect soonP0867
Transmission fluid pressure
Severity: Inspect soonP0902
Clutch actuator circuit voltage too low
Severity: Inspect soonP2711
Unexpected mechanical gear disengagement
Severity: Inspect soonP2723
Pressure control solenoid E stuck off or performing poorly
Severity: Inspect soonP2797
Electric auxiliary transmission fluid pump not performing
Severity: Inspect soonP2813
Pressure control solenoid G range or performance
Severity: Inspect soonP2831
Shift fork A position circuit
Severity: Inspect soonP2859
Clutch A pressure disengagement performance
Severity: Inspect soonP0710
Transmission fluid temperature sensor A circuit fault
Severity: Inspect soonP0713
Transmission fluid temperature sensor A circuit, high input
Severity: Severity not verifiedP0761
Shift solenoid C performance or stuck off
Severity: Inspect soonP0765
Shift solenoid D circuit fault
Severity: Inspect soonP0785
Shift/timing solenoid circuit fault
Severity: Inspect soonP07E4
Transmission unable to engage Park
Severity: Inspect soonP0840
Transmission fluid pressure sensor/switch A circuit fault
Severity: Severity not verifiedP0843
Transmission fluid pressure sensor/switch A circuit, high input
Severity: Severity not verifiedP0929
Gear shift lock solenoid/actuator control circuit A range or performance fault
Severity: Inspect soonP0973
Shift solenoid A control circuit low
Severity: Inspect soonP1720
On Nissan, vehicle speed sensor (automatic transmission output) fault
Severity: Inspect soonP2637
Torque management feedback signal A problem between engine and transmission computers
Severity: Severity not verifiedP073F
Transmission could not engage first gear
Severity: Inspect soonP0763
Shift solenoid C electrical fault
Severity: Inspect soonP0774
Shift solenoid E circuit intermittent
Severity: Inspect soonP0793
No signal from the intermediate shaft speed sensor
Severity: Inspect soonP0797
Pressure control solenoid C stuck on
Severity: Inspect soonP07B4
Park position sensor or switch circuit reading high
Severity: Inspect soonP0810
Clutch position control error
Severity: Inspect soonP0975
Shift solenoid B control circuit out of range or performing poorly
Severity: Inspect soonP1574
Nissan and Infiniti cruise control (ASCD) vehicle speed sensor fault
Severity: Inspect soonP1700
Nissan CVT control unit function fault reported to the engine computer
Severity: Inspect soonP1757
Front brake solenoid circuit fault in a Nissan RE5R05A-type 5-speed automatic
Severity: Severity not verifiedP1774
Low coast brake solenoid valve function fault in a Nissan or Infiniti RE5R05A 5-speed automatic
Severity: Severity not verifiedP17F4
Auxiliary gearbox clutch judder flagged by the transmission computer in a Nissan CVT
Severity: Severity not verifiedP182E
Internal mode switch reports an invalid range in a GM automatic transmission
Severity: Severity not verifiedP1DB7
Torque converter clutch performance fault stored by the transmission computer on Jeep and Chrysler vehicles
Severity: Severity not verifiedP271E
Early CVT primary belt wear warning on Honda HR-V CVTs
Severity: Inspect soonP2767
Input/turbine speed sensor B circuit has no signal
Severity: Severity not verifiedP2817
Pressure control solenoid H performance or stuck off fault in an automatic transmission
Severity: Severity not verifiedP2820
Pressure control solenoid J performance or stuck off fault in an automatic transmission
Severity: Severity not verifiedP285A
Clutch B pressure disengagement performance fault in the transmission (seen on Nissan CVTs)
Severity: Severity not verifiedP1715
Input (primary) speed sensor signal fault in a Nissan or Infiniti automatic or CVT
Severity: Severity not verifiedP1722
Estimated vehicle speed signal fault in a Nissan automatic or CVT; a different stall speed fault on Jaguar
Severity: Severity not verifiedP1750
Mechanical problem in the clutch pressure control hydraulics of a Honda or Acura automatic transmission
Severity: Severity not verifiedP1751
Transmission code whose meaning differs: a hydraulic malfunction on Honda and Acura, a control relay fault on Mitsubishi
Severity: Severity not verifiedP1783
Transmission fluid over-temperature condition on Ford and Mazda automatics
Severity: Severity not verifiedP1790
Fault logged immediately after a shift (Chrysler, Dodge)
Severity: Severity not verifiedP287A
Clutch B stuck engaged (dual clutch transmission)
Severity: Inspect soonP287B
Shift fork 'A' calibration not learned in a dual-clutch transmission (seen on Ford Focus PowerShift)
Severity: Severity not verifiedP0702
Transmission control system electrical fault
Severity: Inspect soonP0703
The computer found a fault in the brake switch circuit it uses to release the torque converter clutch
Severity: Severity not verifiedP0704
The computer found a fault in the clutch pedal switch input circuit
Severity: Severity not verifiedP0708
Gear position (range) sensor signal reads too high
Severity: Severity not verifiedP0709
Transmission range sensor or switch signal that cuts in and out
Severity: Severity not verifiedP0712
Transmission fluid temperature sensor signal reads too low
Severity: Severity not verifiedP0714
Transmission fluid temperature sensor signal that cuts in and out
Severity: Severity not verifiedP0718
Turbine (input) shaft speed sensor signal drops in and out
Severity: Severity not verifiedP0719
Torque converter and brake switch B circuit reading low
Severity: Severity not verifiedP0723
Output shaft speed sensor signal drops in and out
Severity: Inspect soonP0724
Torque converter and brake switch B circuit reading high
Severity: Severity not verifiedP0727
Engine speed signal missing from the transmission's input
Severity: Severity not verifiedP0728
Engine speed input circuit with an intermittent fault
Severity: Severity not verifiedP0743
Torque converter clutch solenoid electrical fault
Severity: Inspect soonP0748
Transmission pressure control solenoid A has an electrical fault
Severity: Inspect soonP0749
Transmission pressure control solenoid circuit with an intermittent fault
Severity: Severity not verifiedP0754
Shift solenoid A circuit with an intermittent fault
Severity: Severity not verifiedP0757
Shift solenoid B is stuck on or not shifting as commanded
Severity: Inspect soonP0759
Shift solenoid B circuit with an intermittent fault
Severity: Severity not verifiedP0762
Shift solenoid C stuck on
Severity: Severity not verifiedP0764
Shift solenoid C circuit with an intermittent fault
Severity: Severity not verifiedP0767
Shift solenoid D stuck on
Severity: Severity not verifiedP0768
Shift solenoid D electrical circuit fault
Severity: Severity not verifiedP0769
Shift solenoid D circuit intermittent
Severity: Severity not verifiedP0771
Shift solenoid E performance or stuck off
Severity: Severity not verifiedP0772
Shift solenoid E stuck on
Severity: Severity not verifiedP0773
Shift solenoid E electrical circuit fault
Severity: Severity not verifiedP0781
1-2 shift malfunction
Severity: Severity not verifiedP0782
2-3 shift malfunction: the transmission did not make the shift between gears 2 and 3 as the computer commanded
Severity: Severity not verifiedP0783
3-4 shift malfunction: the transmission did not make the shift between third and fourth gear as the computer commanded
Severity: Severity not verifiedP0784
4-5 shift malfunction: the transmission did not make the shift between gears 4 and 5 as the computer commanded
Severity: Severity not verifiedP0786
Shift/timing solenoid range/performance problem: the solenoid or its circuit is not performing as the computer expects
Severity: Severity not verifiedP0787
Shift/timing solenoid circuit low: the computer sees a low signal on the solenoid circuit
Severity: Severity not verifiedP0788
Shift/timing solenoid circuit high: the computer sees a high signal on the solenoid circuit
Severity: Severity not verifiedP0790
A fault in the electrical circuit of the transmission's normal/performance mode switch
Severity: Severity not verifiedP0848
Transmission fluid pressure sensor or switch B is reporting a high input
Severity: Severity not verifiedP0880
The transmission computer's power supply circuit looks wrong to the engine computer
Severity: Inspect soonP0882
The transmission computer's power input voltage is too low
Severity: Inspect soonP0883
The transmission control module's power input voltage is too high
Severity: Severity not verifiedP0894
A transmission component is slipping: rotating parts are turning slower than the computer expects
Severity: Severity not verifiedP0934
The transmission line pressure sensor circuit is sending too low a voltage
Severity: Inspect soonP0989
The transmission computer sees a low voltage on the circuit of one of the transmission fluid pressure switches, labelled E
Severity: Inspect soonP1775
Solenoid switch valve stuck in the torque converter clutch position
Severity: Severity not verifiedP1776
Solenoid switch valve stuck in the low/reverse position
Severity: Inspect soonP1C86
On Jeep and Dodge models with an electronic shifter, the shifter reported a current fault in the circuit that lights the gear-position (PRNDL) display
Severity: Severity not verifiedP215C
On Chrysler, Dodge, Jeep and Ram vehicles, the transmission computer sees the output shaft speed and the wheel speeds disagree
Severity: Inspect soonP2700
Transmission clutch or brake element A is slow to apply or does not apply as the computer expects
Severity: Severity not verifiedP2713
Transmission pressure control solenoid D fault
Severity: Severity not verifiedP2753
Transmission fluid cooler valve circuit is open
Severity: Severity not verifiedP2762
Torque converter clutch pressure control solenoid circuit range or performance fault
Severity: Severity not verified
Ignition and engine position sensors
The engine computer times spark and fuel from the crankshaft and camshaft position sensors, protects the engine from knock using knock sensors, and drives the ignition coils.
P0340
Camshaft position sensor circuit fault (bank 1 or single sensor)
Severity: Inspect soonP0335
Crankshaft position sensor A circuit fault
Severity: Inspect soonP0325
Knock sensor 1 circuit fault (bank 1 or single sensor)
Severity: Inspect soonP0332
Knock sensor 2 circuit voltage low (bank 2)
Severity: Inspect soonP0345
Camshaft position sensor A circuit fault (bank 2)
Severity: Inspect soonP0341
Camshaft position sensor signal out of expected range (bank 1 or single sensor)
Severity: Inspect soonP0351
Ignition coil A primary or secondary circuit fault
Severity: Inspect soonP0336
The crankshaft position sensor 'A' signal is present but out of the expected range or pattern
Severity: Inspect soonP0369
The bank 1 camshaft position sensor 'B' signal drops out intermittently
Severity: Inspect soonP1326
Hyundai and Kia: the knock sensor detection system (KSDS) has picked up vibration that matches abnormal connecting rod bearing wear
Severity: StopP0326
Knock sensor 1 range/performance, bank 1: the knock sensor signal is outside what the engine computer expects
Severity: MonitorP0344
Camshaft position sensor A circuit intermittent, bank 1 or single sensor: the cam sensor signal drops out or comes and goes
Severity: Inspect soonP0352
Ignition coil B primary or secondary circuit fault
Severity: Inspect soonP0365
Camshaft position sensor B circuit, bank 1: the engine computer sees a missing or faulty signal from the bank 1 exhaust camshaft sensor
Severity: Inspect soonP1320
Nissan and Infiniti: the engine computer is not seeing the expected ignition primary signal back from the ignition coils
Severity: Inspect soonP1327
Hyundai and Kia: the engine noise monitoring logic has detected piston ring or cylinder wall damage
Severity: StopP0324
Knock control system error
Severity: Inspect soonP0339
Crankshaft position sensor A circuit intermittent
Severity: Inspect soonP0353
Ignition coil C primary or secondary circuit fault
Severity: Inspect soonP0354
Ignition coil D primary or secondary circuit fault
Severity: Inspect soonP0366
Camshaft sensor B signal out of range or unreliable (bank 1)
Severity: Inspect soonP0355
Ignition coil E primary or secondary circuit fault (the coil for cylinder 5 on most engines)
Severity: Inspect soonP0356
Ignition coil F primary or secondary circuit fault (the coil for cylinder 6 on most engines)
Severity: Inspect soonP0328
Knock sensor 1 signal too high (bank 1)
Severity: MonitorP0320
Engine speed signal missing or unreliable at the engine computer
Severity: Inspect soonP0333
Knock sensor 2 circuit fault on bank 2 (the side of the engine away from cylinder 1)
Severity: MonitorP050B
Cold start ignition timing performance: the engine is not reaching the expected spark timing during the cold-start warm-up
Severity: MonitorP0197
Oil temperature sensor reporting a voltage that is too low
Severity: MonitorP0198
Oil temperature sensor reporting a voltage that is too high
Severity: MonitorP0199
Oil temperature sensor signal dropping in and out
Severity: MonitorP0315
The computer has not finished learning the crankshaft position pattern, or the pattern it sees no longer matches what it stored
Severity: Severity not verifiedP0321
Engine speed sensor signal out of range or implausible
Severity: Inspect soonP0322
No signal from the engine speed input (crankshaft or distributor) circuit
Severity: Inspect soonP0327
Knock sensor 1 on bank 1 is sending a signal that is too low
Severity: Severity not verifiedP0329
Knock sensor 1 circuit intermittent (bank 1 or single sensor)
Severity: Inspect soonP0330
Fault in the knock sensor 2 circuit (bank 2)
Severity: Severity not verifiedP0331
Knock sensor 2 (bank 2) signal is outside the expected range or performance
Severity: MonitorP0334
Knock sensor 2 (bank 2) circuit has an intermittent fault
Severity: MonitorP0337
Crankshaft position sensor A circuit signal is too low
Severity: Inspect soonP0338
Crankshaft position sensor A circuit signal is too high
Severity: Inspect soonP0342
Camshaft position sensor signal reads too low (circuit low input)
Severity: Inspect soonP0346
The bank 2 camshaft position sensor A signal is out of range or not behaving as expected
Severity: Severity not verifiedP0350
The computer found a fault in the primary or secondary circuit of an ignition coil
Severity: Severity not verifiedP0357
The computer found a fault in the primary or secondary circuit of ignition coil G (cylinder 7 by the usual reading)
Severity: Severity not verifiedP0358
The computer found a fault in the primary or secondary circuit of ignition coil H (cylinder 8 by the usual reading)
Severity: Severity not verifiedP0359
The computer found a fault in the primary or secondary circuit of ignition coil I (cylinder 9 by the usual reading)
Severity: Severity not verifiedP0360
The computer found a fault in the primary or secondary circuit of ignition coil J (cylinder 10 by the usual reading)
Severity: Severity not verifiedP0361
Problem in the electrical circuit of ignition coil K, the coil for cylinder 11 on a V12 engine
Severity: Severity not verifiedP0362
Problem in the electrical circuit of ignition coil L, the coil for cylinder 12 on a V12 engine
Severity: Severity not verifiedP0370
The engine computer is not getting the crankshaft timing reference signal it expects
Severity: Severity not verifiedP0371
The crankshaft timing signal shows more pulses than the computer expects
Severity: Severity not verifiedP0372
The crankshaft or camshaft timing signal shows fewer pulses than the computer expects
Severity: Severity not verifiedP0373
The computer's high-resolution engine timing reference signal A shows intermittent or erratic pulses
Severity: Severity not verifiedP0374
The computer's high-resolution engine timing reference signal A shows no pulses
Severity: Severity not verifiedP0375
The computer's high-resolution engine timing reference signal B has a malfunction
Severity: Severity not verifiedP0376
The computer's high-resolution engine timing reference signal B shows too many pulses
Severity: Severity not verifiedP0377
The computer's high-resolution engine timing reference signal B shows too few pulses
Severity: Severity not verifiedP0378
The computer sees erratic or dropping pulses on a second high-resolution engine position signal
Severity: Severity not verifiedP0379
The computer gets no pulses on a second high-resolution engine position signal
Severity: Severity not verifiedP0385
Crankshaft position sensor B circuit malfunction
Severity: Inspect soonP0386
Crankshaft position sensor B signal out of range or not performing as expected
Severity: Inspect soonP0387
Crankshaft position sensor B signal too low
Severity: Inspect soonP0388
Crankshaft position sensor B signal too high
Severity: Inspect soonP0389
Crankshaft position sensor B signal drops in and out
Severity: Inspect soonP0390
The bank 2 camshaft position sensor B circuit is malfunctioning
Severity: Severity not verifiedP0394
Bank 2 exhaust camshaft position sensor signal drops in and out (intermittent circuit)
Severity: Inspect soonP2302
The spark circuit of the first ignition coil is not producing the signal the computer expects
Severity: Severity not verified
Vehicle speed, idle control and engine electrical
These codes cover inputs and outputs the engine computer depends on but that are not part of a single emissions system: the vehicle speed sensor, idle speed control, the engine oil pressure sensor and the system voltage the computer runs on.
P0507
Idle speed higher than the computer is aiming for
Severity: MonitorP0521
Engine oil pressure sensor or switch range/performance
Severity: Inspect soonP0500
Vehicle speed sensor signal missing or not believable
Severity: Inspect soonP0562
System voltage low
Severity: Inspect soonP0520
Engine oil pressure sensor or switch circuit malfunction
Severity: Inspect soonP050A
Idle speed off target just after a cold start
Severity: MonitorP052E
Crankcase ventilation (PCV) regulator valve not working as expected
Severity: MonitorP0219
Engine overspeed condition
Severity: Severity not verifiedP0506
Idle control system RPM lower than expected
Severity: MonitorP050D
Cold start rough idle
Severity: Inspect soonP0505
Idle air control system malfunction
Severity: MonitorP0524
Engine oil pressure too low
Severity: StopP0556
Brake booster pressure sensor circuit range or performance
Severity: Inspect soonP1500
Vehicle speed sensor signal intermittent (Ford, Lincoln)
Severity: Inspect soonP0504
The two brake switch signals disagree
Severity: Severity not verifiedP051B
Crankcase pressure sensor signal out of range
Severity: Inspect soonP0523
Engine oil pressure sensor or switch circuit reading too high in voltage
Severity: Inspect soonP2583
Adaptive cruise control distance (radar) sensor signal or alignment fault
Severity: MonitorP0571
Brake switch A circuit fault, the switch that tells the computer and cruise control when the brake pedal is pressed
Severity: Inspect soonP0501
The vehicle speed sensor signal is out of range or does not make sense
Severity: Inspect soonP0502
The vehicle speed sensor signal is lower than the computer expects
Severity: Inspect soonP0503
The computer is getting a vehicle speed signal that is erratic, drops out, or reads too high
Severity: Inspect soonP0510
The closed throttle position switch is reporting a fault
Severity: MonitorP0522
Engine oil pressure sensor or switch circuit reading too low in voltage
Severity: Inspect soonP0565
Cruise control master switch ON signal malfunction
Severity: Severity not verifiedP0566
Cruise control master switch OFF signal malfunction
Severity: Severity not verifiedP0567
Fault in the Resume signal from the cruise control selector switch
Severity: MonitorP0568
Fault in the Set signal from the cruise control master switch
Severity: MonitorP0569
Fault in the Coast signal from the cruise control selector switch
Severity: MonitorP0572
Brake switch A circuit signal reading too low, the switch that tells the computer and cruise control when the brake pedal is pressed
Severity: Inspect soonP0573
Cruise control or brake switch A circuit reading high
Severity: Severity not verifiedP0585
Cruise control multi-function switch inputs A and B do not agree
Severity: MonitorP250F
The engine oil level signal says the oil is low
Severity: Inspect soon
Turbocharging, fuel pressure and EGR
Turbocharged and direct-injection engines rely on boost pressure and high fuel pressure, and many engines recirculate some exhaust (EGR) to lower combustion temperatures.
P0299
Turbocharger or supercharger is producing less boost than the engine computer requested
Severity: Inspect soonP0087
Fuel pressure in the rail or supply system is lower than the engine computer requested
Severity: Inspect soonP0401
Exhaust gas recirculation (EGR) flow insufficient detected
Severity: MonitorP0089
Fuel pressure regulator not holding the pressure the computer asks for
Severity: Inspect soonP0191
Fuel rail pressure sensor reading does not make sense
Severity: Inspect soonP0088
Fuel rail pressure higher than the engine computer wants
Severity: Inspect soonP00C6
Fuel rail pressure too low while the engine is cranking
Severity: Inspect soonP0192
Fuel rail pressure sensor signal reads too low
Severity: Inspect soonP0234
Turbocharger or supercharger boost pressure is higher than the engine computer requested
Severity: Inspect soonP0404
The EGR valve or its position sensor is not working within the expected range
Severity: MonitorP228C
Fuel pressure regulator 1 cannot bring rail pressure up to target
Severity: Inspect soonP00AF
Turbo boost control module performance fault
Severity: Inspect soonP0240
Second boost sensor not reading as expected
Severity: Inspect soonP0402
EGR flow higher than the computer expects
Severity: MonitorP0405
EGR sensor circuit reading low
Severity: MonitorP0236
Turbo boost sensor reading does not make sense
Severity: Inspect soonP0403
EGR control circuit electrical fault
Severity: MonitorP0406
EGR position sensor signal too high
Severity: MonitorP0190
Fuel rail pressure sensor circuit fault
Severity: Severity not verifiedP1491
On Honda, the EGR valve does not lift enough; on Nissan, a fault in the EVAP vacuum cut valve bypass valve
Severity: Severity not verifiedP2562
Turbo boost control position sensor circuit fault
Severity: MonitorP2565
Turbo boost control position sensor signal reading too high
Severity: MonitorP0035
Turbo or supercharger bypass valve control circuit reads high
Severity: Inspect soonP003A
Turbo boost control position (vane or actuator) outside the range the computer has learned
Severity: Inspect soonP2263
Turbo or supercharger boost not matching the computer target (system A)
Severity: Inspect soonP0046
Turbocharger boost control circuit performance fault
Severity: Inspect soonP0235
A fault in the circuit of the turbocharger boost pressure sensor A
Severity: Severity not verifiedP0237
Turbo boost pressure sensor signal too low
Severity: Severity not verifiedP0238
The turbocharger boost pressure sensor A is reporting a signal that is too high
Severity: Inspect soonP0241
Turbo boost (manifold pressure) sensor B signal is too low
Severity: Severity not verifiedP0242
Turbo boost (manifold pressure) sensor B signal is too high
Severity: Severity not verifiedP0243
Turbocharger wastegate solenoid or regulating valve A: circuit malfunction
Severity: Severity not verifiedP0244
Turbocharger wastegate solenoid or regulating valve A: range/performance
Severity: Severity not verifiedP0245
Turbocharger wastegate solenoid or regulating valve A: circuit low
Severity: Severity not verifiedP0246
Wastegate solenoid A signal too high
Severity: Severity not verifiedP0247
Wastegate solenoid B not working correctly
Severity: Severity not verifiedP0248
Wastegate solenoid B outside expected performance
Severity: Severity not verifiedP0249
Wastegate solenoid B signal too low
Severity: Severity not verifiedP0250
Wastegate solenoid B signal too high
Severity: Severity not verifiedP0400
Exhaust gas recirculation flow is not what the computer expects
Severity: MonitorP0407
EGR valve position sensor B signal reads too low
Severity: Severity not verifiedP0408
EGR valve position sensor B signal reads too high
Severity: Severity not verifiedP0489
The computer sees a low voltage in the EGR valve control circuit
Severity: Severity not verifiedP226C
Turbocharger boost is slow to respond to what the computer commanded
Severity: Severity not verifiedP2563
Turbocharger boost control position sensor reading is out of range or does not make sense
Severity: Severity not verified
ABS, traction and stability control
Anti-lock brakes stop the wheels locking under hard braking, and the same control module usually runs traction control and electronic stability control, which brake single wheels and can cut engine power to keep the car pointed where the driver steers.
C0020
ABS pump motor control circuit fault
Severity: Inspect soonC1185
ABS power relay output circuit failure (Ford)
Severity: Inspect soonC1194
ABS left front outlet valve circuit fault (Ford)
Severity: Inspect soonC1198
ABS left front inlet valve circuit fault (Ford)
Severity: Inspect soonC1210
ABS outlet valve coil circuit failure, right front (Ford)
Severity: Inspect soonC1214
ABS inlet valve coil circuit failure, right front (Ford)
Severity: Inspect soonC1223
ABS control system malfunction seen by stability control (Toyota)
Severity: Inspect soonC1242
ABS left rear outlet valve circuit fault (Ford)
Severity: Inspect soonC1246
ABS right rear outlet valve circuit fault (Ford)
Severity: Inspect soonC1247
Brake pedal stroke sensor fault (Toyota)
Severity: Inspect soonC1252
Hybrid brake booster or actuator fault (Toyota, Lexus) or vacuum pump control circuit (Chrysler, Jeep, Ram)
Severity: Inspect soonC1253
Hybrid brake booster or actuator fault, internal brake fluid leak (Toyota, Lexus)
Severity: Inspect soonC1254
ABS right rear inlet valve circuit fault (Ford)
Severity: Inspect soonC1256
Hybrid brake booster or actuator fault, internal brake fluid leak (Toyota, Lexus)
Severity: Inspect soonC1391
Hybrid brake booster or actuator fault, internal brake fluid leak (Toyota, Lexus)
Severity: Inspect soonC2200
Anti-lock brake module internal fault (Ram, Dodge)
Severity: Inspect soonP25A2
Brake control module has asked for the check engine light
Severity: Inspect soonC1203
Skid control ECU to engine computer communication malfunction (Toyota)
Severity: Inspect soonC121C
Torque request signal denied, stored in the ABS module (Chrysler, Jeep, Ram)
Severity: Inspect soonC1241
Low or high power supply voltage to the skid control (ABS/VSC) ECU (Toyota)
Severity: Inspect soonC1963
Stability control inhibit warning, stored in the ABS module (Ford)
Severity: Inspect soonC0021
Brake booster performance or signal fault (Dodge and Jeep)
Severity: Inspect soonC0040
Right front wheel speed sensor circuit (GM) or brake lamp switch (Honda)
Severity: Inspect soonC0051
Steering wheel position (angle) sensor signal fault
Severity: Inspect soonC0242
Engine computer reporting a fault that blocks traction control
Severity: Inspect soonC1235
Right rear wheel speed sensor input missing (Ford)
Severity: Inspect soonC1513
Brake switch circuit fault (Hyundai)
Severity: Inspect soonC1A16
Radar sensor blocked or obstructed (Nissan)
Severity: Inspect soonC006C
Can-Am Ryker yaw rate or steering angle sensor fault
Severity: Inspect soonC0196
Stability system sees a sensor or motion fault (GM)
Severity: Inspect soonC0210
Right rear wheel speed sensor circuit or signal fault
Severity: Inspect soonC0800
GM chassis control module voltage fault
Severity: Inspect soonC1130
ABS control unit not recognising an engine computer signal (Nissan and Infiniti)
Severity: Inspect soonC1201
Toyota engine control communication fault reported by the skid control system
Severity: Inspect soonC1231
Toyota skid control (ABS/VSC) fault, tied to the steering angle sensor input
Severity: Inspect soonC1234
ABS wheel sensor output failure (Ford)
Severity: Inspect soonC1237
Primary brake pressure sensor signal (Hyundai) or rear wheel speed sensor (Ford)
Severity: Inspect soonC1310
Toyota active brake booster solenoid fault
Severity: Inspect soonC1480
Right front wheel brake pressure control fault (Ford and Mercury hybrids)
Severity: Inspect soonC0035
Left front wheel speed sensor circuit fault (GM)
Severity: Severity not verifiedC0131
Brake pressure circuit fault (GM)
Severity: Severity not verifiedC1446
Brake switch circuit failure (Ford)
Severity: Severity not verifiedC0037
Left rear wheel speed sensor circuit fault
Severity: Inspect soonC003A
Right rear wheel speed sensor circuit fault
Severity: Inspect soonC0161
ABS computer does not trust the brake pedal switch signal
Severity: Inspect soonC0186
Sideways (lateral) acceleration sensor signal faulty or not believable
Severity: Inspect soonC0215
Left rear wheel speed sensor circuit fault (Toyota)
Severity: Inspect soonC0265
ABS computer reports a fault in its relay circuit
Severity: Inspect soonC0277
Brake pedal position sensor fault (GM)
Severity: Inspect soonC0287
Stability computer flags a fault in a motion-sensing signal circuit
Severity: Inspect soonC0550
A chassis control module reports an internal fault
Severity: Inspect soonC1116
Stop lamp switch circuit fault in the ABS system (Nissan)
Severity: Inspect soonC1236
Left rear wheel speed sensor input missing (Ford)
Severity: Inspect soonC1300
ABS / skid control ECU malfunction (Toyota)
Severity: StopP050F
Not enough vacuum for the brake booster
Severity: Inspect soonC1226
Excessive wheel speed variation at one front wheel (GM)
Severity: Inspect soonC159C
Trailer brake control switch fault (Chevrolet, GMC)
Severity: Inspect soonC0050
Right rear wheel speed sensor circuit fault (GM)
Severity: Severity not verifiedC1221
Left front wheel speed sensor signal is zero (Chevrolet)
Severity: Severity not verifiedC1233
On Chevrolet and Buick, right front wheel speed sensor circuit open or shorted
Severity: Severity not verifiedC1345
Brake linear solenoid valve offset learning not done (Toyota)
Severity: Severity not verifiedC0031
Left front wheel speed sensor circuit fault (Ford and Lincoln)
Severity: Severity not verifiedC0045
Left rear wheel speed sensor circuit fault (GM)
Severity: Severity not verifiedP0555
Brake booster pressure sensor circuit fault
Severity: Inspect soonP258B
Brake vacuum pump not performing as the computer expects
Severity: Inspect soon
Module network (CAN bus) communication
Modern vehicles have many control modules (engine, transmission, ABS, airbags, body) that share information over a wired network, usually a two-wire CAN bus.
U0073
A module found its data network (bus A) switched off or not working
Severity: Inspect soonU0100
Lost communication with the engine or powertrain computer
Severity: Inspect soonU0101
Lost communication with the transmission computer
Severity: Inspect soonU0121
Lost communication with the anti-lock brake (ABS) module
Severity: Inspect soonU0131
Lost communication with the power steering control module
Severity: Inspect soonU0140
Lost communication with the body control module
Severity: Inspect soonU0401
A module received invalid data from the engine or powertrain computer
Severity: Severity not verifiedU0402
A module received invalid data from the transmission computer
Severity: Inspect soonU0415
A module received invalid data from the anti-lock brake (ABS) module
Severity: Inspect soonU3000
Manufacturer code: on Ford, Honda, Acura and Mazda, the module that stored it found a fault inside itself
Severity: Inspect soonU0001
A module reports a fault on the high-speed CAN bus itself, the main data network that links the engine, transmission, brake and steering computers
Severity: Inspect soonU0151
Lost communication with the restraints (airbag) control module
Severity: Inspect soonU0155
Lost communication with the instrument panel cluster
Severity: Inspect soonU0170
Lost communication with restraints system sensor A
Severity: Inspect soonU0404
A module received implausible data from the gear shift (shifter) module
Severity: Inspect soonU0416
A module received implausible data from the stability control (vehicle dynamics) module
Severity: Inspect soonU0418
A module received implausible data from the brake system (ABS) control module
Severity: Inspect soonU0420
A module received implausible data from the power steering control module
Severity: Inspect soonU0422
A module received implausible data from the body control module
Severity: Severity not verifiedU1000
Manufacturer code: on Nissan and Infiniti a module saw an error on the CAN network; on older GM vehicles it is a Class 2 serial data fault
Severity: Inspect soonU3003
Manufacturer code: on Ford, Lincoln, Mazda and Honda, the module that stored it saw its battery supply voltage outside the allowed range, usually too low
Severity: Inspect soonU0002
The high-speed CAN bus is still working but with too many errors or a poor signal
Severity: Inspect soonU0103
A module lost communication with the electronic gear shift module, the computer behind the shifter
Severity: Inspect soonU0146
A module lost communication with gateway module A, which passes messages between the vehicle networks
Severity: Inspect soonU0293
A module lost communication with the hybrid or EV powertrain control module on the vehicle network
Severity: Inspect soonU0412
A module received invalid data from the battery energy control module, the computer that manages the high-voltage battery
Severity: Inspect soonU1110
Manufacturer code: on Jeep and Dodge, U1110 means a module lost the vehicle speed message it expects over the vehicle network
Severity: Inspect soonU1120
Manufacturer code: on Jeep and Dodge, U1120 means a module lost the wheel distance message it expects over the vehicle network
Severity: Inspect soonU0109
Lost communication with the fuel pump control module
Severity: Inspect soonU0111
Lost communication with the battery energy control module
Severity: Inspect soonU0141
Lost communication with the body control module
Severity: Inspect soonU0164
Lost communication with the HVAC control module
Severity: Severity not verifiedU18A2
On Chevrolet, U18A2 means the engine computer lost communication with the fuel pump driver control module
Severity: Inspect soonU2023
On Ford, U2023 means a module received a fault status message from another module on the network
Severity: Inspect soonU2100
On Ford and Lincoln, U2100 means a module reports that its initial configuration is not complete
Severity: Inspect soonU2603
On the Chevrolet Volt, U2603 is the first of a block of codes set when the Battery Energy Control Module loses communication with the battery interface modules
Severity: Inspect soonU2624
On the Chevrolet Volt, U2624 is part of the Battery Energy Control Module communication code block, stored with U2603-U2606 and P1E00
Severity: Inspect soonU0102
U0102 is a generic network code: a module lost communication with the transfer case control module on a four-wheel or all-wheel-drive vehicle
Severity: Inspect soonU0122
U0122 is a generic network code: a module lost communication with the vehicle dynamics control module, which runs stability control and often shares the ABS hardware
Severity: Inspect soonU0129
U0129 is a generic network code: a module on the vehicle network lost communication with the brake control module (ABS or stability module), usually stored by the engine, body or instrument computer
Severity: Inspect soonU0428
U0428 is a generic network code: a module received invalid data from the steering angle sensor or steering angle control module, which stability control and power steering rely on
Severity: Inspect soonU1010
On Ford hybrids such as the Maverick Hybrid, U1010 is a manufacturer network code reported by dealers as invalid internal control module monitoring data received from the hybrid powertrain control module
Severity: Inspect soonU1262
On Ford vehicles of the early 2000s, U1262 is a network code meaning the SCP communication bus (the standard corporate protocol data link between modules) has a fault, often stored in the instrument cluster
Severity: Inspect soonU2105
On Chevrolet and other GM vehicles with the GMLAN network, U2105 is a network code meaning another module lost communication with the engine control module
Severity: Inspect soonU3006
On Honda and Acura vehicles, U3006 is a network code set when a control module sees a power supply problem on its input power circuit (low voltage or an open circuit), with the suffix such as -13 or -16 showing which
Severity: Inspect soonU0104
A module on the network stopped hearing the cruise control module
Severity: Severity not verifiedU0212
A module on the network stopped hearing the steering column control module
Severity: Inspect soonU0423
A module received invalid data from the instrument panel control module
Severity: Severity not verifiedU1504
On Chrysler vehicles, U1504 is a network code for an implausible message length from the steering angle sensor
Severity: Inspect soonU2107
On Chevrolet and other GM vehicles with the GMLAN network, U2107 means the engine control module lost communication with the body control system
Severity: Inspect soonU0126
A module on the network stopped hearing the steering angle sensor
Severity: Inspect soonU0159
A module on the network stopped hearing the parking assist control module
Severity: Severity not verifiedU029D
A module on the network stopped hearing the first (upstream) NOx sensor module
Severity: Inspect soonU029E
A module on the network stopped hearing the second (downstream) NOx sensor module
Severity: Inspect soonU0452
A module received data from the restraints (airbag) control module that did not make sense
Severity: Inspect soonU1001
On Nissan vehicles, U1001 is a CAN network communication code, stored when control units cannot communicate over the CAN lines
Severity: Inspect soonU1004
On Hyundai hybrids, U1004 is a CAN communication code for the hybrid control network, typically stored with U0293 lost communication with the hybrid powertrain control module
Severity: Inspect soonU1267
On Chrysler, Jeep and Ram vehicles, U1267 means the electronic shift module is sending no valid data on the CAN network
Severity: Inspect soonU1424
On Chrysler, Dodge, Jeep and Ram vehicles, U1424 means a module received an implausible engine torque signal
Severity: Inspect soonU160F
On GM trucks and SUVs, U160F means lost communication with brake system control module 1 on CAN bus 1
Severity: Inspect soonU1403
On Chrysler vehicles, U1403 means the fuel level signal received over the network is implausible
Severity: Severity not verifiedU1428
On Jeep, U1428 is set when the transmission control module receives an engine torque value from the engine computer that it judges inaccurate or stuck
Severity: Inspect soonP1698
On Dodge and Chrysler, the engine computer stopped receiving messages from the transmission computer on the vehicle data bus
Severity: Severity not verifiedU0029
Vehicle communication network bus A performance fault
Severity: Severity not verifiedU010C
Lost communication with the turbocharger/supercharger control module
Severity: Severity not verifiedU0184
Lost communication with the radio
Severity: Severity not verifiedU0199
Lost communication with door control module A
Severity: Severity not verified
Airbags and seat-belt restraints (SRS)
The supplemental restraint system fires the airbags and seat-belt pretensioners in a crash.
B0020
Airbag firing circuit fault, usually the driver-side seat airbag (varies by maker)
Severity: Inspect soonB0081
Passenger presence (seat occupant sensing) system fault
Severity: Inspect soonB00A0
Occupant classification sensor or control unit fault
Severity: Inspect soonB0111
Side airbag firing circuit open (Toyota, Lexus)
Severity: Inspect soonB1018
Passenger seat occupant sensor mat malfunction (Nissan)
Severity: Inspect soonB1342
Control module internal fault (Ford, Lincoln)
Severity: Inspect soonB1448
Front passenger seat occupant sensor mat fault (Kia)
Severity: Inspect soonB0001
Driver front airbag first-stage firing circuit fault
Severity: Inspect soonB0014
Driver seat side airbag deployment loop fault
Severity: Inspect soonB0074
Passenger presence sensor circuit fault
Severity: Inspect soonB1346
Driver airbag (first stage) circuit resistance too high (Kia, Hyundai)
Severity: Inspect soonB1378
Driver side airbag circuit resistance too high (Suzuki, Kia)
Severity: Inspect soonB1382
Passenger side airbag circuit resistance too high (Suzuki, Hyundai, Kia)
Severity: Inspect soonB141B
Second-row inflatable seat belt deployment circuit fault (Ford)
Severity: Inspect soonB141C
Second-row inflatable seat belt deployment circuit fault (Ford)
Severity: Inspect soonB1650
Occupant detection/classification system malfunction (Subaru, Toyota)
Severity: Inspect soonB1760
Occupant detection system sensor mat abnormal (Subaru)
Severity: Inspect soonB1764
BodySense passenger occupant mat defect (Kia)
Severity: Inspect soonB1801
Driver airbag (D squib) circuit open (Toyota)
Severity: Inspect soonB1B02
Driver airbag squib 1 circuit open (Jeep)
Severity: Inspect soonB0022
Front seat belt pretensioner circuit fault (varies by maker)
Severity: Inspect soonB0028
Right side airbag firing circuit open or high resistance (Honda, Chrysler, Ram)
Severity: Inspect soonB0092
Passenger presence system (seat occupant sensing) circuit fault (GM)
Severity: Inspect soonB0116
Side airbag firing circuit open (Toyota)
Severity: Inspect soonB1312
Passenger seat occupant sensing fault, occupancy mat or module (Suzuki)
Severity: Inspect soonB1481
Driver airbag circuit resistance too high, second stage (Hyundai, Kia)
Severity: Inspect soonB1701
Front seat belt buckle (pretensioner) circuit resistance too high (Hyundai)
Severity: Inspect soonB1861
Driver side knee airbag circuit open (Lexus)
Severity: Inspect soonB0026
GM frontal airbag deployment loop fault
Severity: Inspect soonB1049
Nissan driver airbag module circuit open
Severity: Inspect soonB1054
Nissan driver airbag circuit open
Severity: Inspect soonB1318
Suzuki passenger seat occupant sensing fault
Severity: Inspect soonB1490
Hyundai occupant classification system fault
Severity: Inspect soonB1620
Hyundai airbag control module internal fault
Severity: Inspect soonB1B06
Jeep driver airbag squib 2 circuit open
Severity: Inspect soonB0012
Fault in the passenger-side front airbag firing circuit (resistance low)
Severity: Inspect soonB1129
Right side airbag module circuit fault (Nissan and Infiniti)
Severity: Inspect soonB1134
Front left side airbag module circuit open (Nissan and Infiniti)
Severity: Inspect soonB0041
Airbag deployment loop open, left front (driver-side) side airbag circuit (Chevrolet)
Severity: Inspect soonB1022
Occupant sensor control unit fault in the passenger seat (Nissan)
Severity: Inspect soonB1821
Open side airbag (squib) circuit, driver seat side (Toyota)
Severity: Inspect soonB1881
Passenger seat belt pretensioner circuit open or high resistance (Ford and Mazda)
Severity: Inspect soonB1C29
Left side seat thorax airbag squib 1 circuit open (Dodge)
Severity: Inspect soonB2290
Occupant classification system fault, front passenger seat (Mercury)
Severity: Inspect soonB2292
Seat belt pretensioner circuit fault (Ford)
Severity: Inspect soonB0052
Airbag computer logged a deployment command (Chevrolet and GMC)
Severity: Inspect soonB0085
GM left front side impact sensor circuit fault
Severity: Inspect soonB1495
Belt tension sensor defect in the passenger occupant detection system (Hyundai and Kia)
Severity: Inspect soonB1513
Passenger seat belt buckle switch circuit open or shorted to battery voltage (Hyundai and Kia)
Severity: Inspect soonB0013
Driver steering wheel air bag, stage 2 firing circuit fault
Severity: Inspect soonB0015
Driver seat belt pretensioner firing circuit fault
Severity: Inspect soon
Engine computer (ECM/PCM)
The engine computer (ECM or PCM) runs fuel, spark and emissions control and also checks itself: its memory, its processor, its programming and the regulated voltage it supplies to sensors.
P0606
A control module found a fault in its own processor or programming
Severity: Inspect soonP0607
A control module failed one of its internal performance checks
Severity: Inspect soonP061B
Engine computer’s internal torque calculation check failed
Severity: Inspect soonP06DD
Oil pump pressure control not responding, as if stuck off
Severity: Inspect soonP0601
Control module internal memory checksum error
Severity: Inspect soonP061A
Engine computer internal fault: torque monitoring performance
Severity: Inspect soonP0685
ECM/PCM power relay control circuit open
Severity: Inspect soonP06DA
Oil pressure control solenoid circuit open or high resistance
Severity: Inspect soonP1603
Engine stall history (Toyota)
Severity: Inspect soonP1605
Rough idling (Toyota)
Severity: Inspect soonP2615
Camshaft position signal output circuit voltage low
Severity: Inspect soonP0600
Engine computer lost communication with another module
Severity: Inspect soonP0605
The engine computer failed its own read-only memory check
Severity: Inspect soonP060A
The engine computer's monitoring processor reports a performance fault
Severity: Inspect soonP068A
Engine computer power relay switched off too early
Severity: Inspect soonP06DE
Engine oil pressure control circuit stuck on
Severity: Inspect soonP2638
Engine and transmission computers disagree on the torque signal
Severity: Severity not verifiedP0651
The 5-volt reference supply (circuit B) that powers a group of sensors is out of range
Severity: Inspect soonP2610
The engine computer internal engine-off timer is not performing as expected
Severity: MonitorP061C
Engine computer reports a fault in its own engine speed check
Severity: MonitorP0688
Engine computer power relay sense circuit fault
Severity: Inspect soonP06B8
Engine computer reports a fault in its non-volatile memory
Severity: MonitorP0604
Internal memory (RAM) fault inside the engine or powertrain control module
Severity: Inspect soonP0641
The 5-volt reference supply (circuit A) that powers several engine sensors is out of range
Severity: Inspect soonP0657
Actuator supply voltage circuit open or out of range: the module that powers the engine and throttle actuators sees a problem with their supply
Severity: Inspect soonP00FF
Body control module asked for the check engine light to be turned on
Severity: Severity not verifiedP032F
The engine is producing less torque than the computer expects
Severity: Severity not verifiedP0602
Control module programming error
Severity: Inspect soonP0603
Control module keep alive memory error
Severity: Inspect soonP0608
The engine computer found a fault in the speed signal it sends out to other systems
Severity: Severity not verifiedP0609
The engine computer cannot pass its vehicle speed signal (output B) to other modules
Severity: Severity not verifiedP060C
The engine or vehicle computer found a problem with its own main processor
Severity: Inspect soonP062F
A control module found an error in its own stored memory (EEPROM)
Severity: Inspect soonP0643
The sensor reference voltage A circuit reads too high
Severity: Inspect soonP0650
Check engine light circuit fault: the engine computer sees a problem in the circuit that switches the malfunction indicator lamp
Severity: Severity not verifiedP0653
The engine computer sees too much voltage on its sensor reference supply B
Severity: Inspect soonP0655
The engine computer found a fault in the circuit that drives the engine-hot warning lamp
Severity: Severity not verifiedP0656
The engine computer found a fault in the fuel level output circuit that feeds the fuel gauge signal
Severity: Severity not verifiedP2509
The engine computer's power supply is dropping out on and off
Severity: Inspect soon
Electronic throttle and accelerator pedal
On most modern cars the accelerator pedal is not connected to the throttle by a cable.
P2101
The engine computer sees a problem in the throttle actuator motor circuit or the motor's response, so actual throttle position doesn't match what was commanded
Severity: Inspect soonP2104
The engine computer has forced the engine to idle as a fail-safe because of a throttle control fault
Severity: Inspect soonP2106
The engine computer has limited engine power as a fail-safe because of a throttle control fault
Severity: Inspect soonP2111
The engine computer commanded the electronic throttle to close further but saw it stay more open than expected
Severity: Inspect soonP2112
The engine computer commanded the electronic throttle to open but saw it stay more closed than expected
Severity: Inspect soonP2119
The electronic throttle body's actual position doesn't match the position the engine computer expects
Severity: Inspect soonP2122
The signal from accelerator pedal position sensor D (usually the first pedal sensor) is lower than its normal range
Severity: Inspect soonP2135
Two throttle or pedal position sensor signals (A and B) that should agree with each other don't
Severity: Inspect soonP2138
Two accelerator pedal position sensor signals (D and E) that should agree with each other don't
Severity: Inspect soonP0121
The throttle position sensor A signal doesn't agree with what the engine computer expects, even though the voltage is within range
Severity: Inspect soonP0122
The throttle position sensor A signal voltage is below its normal range
Severity: Inspect soonP0123
The throttle position sensor A signal voltage is above its normal range
Severity: Inspect soonP2110
The engine computer has deliberately limited engine speed because of a fault it found in the electronic throttle system
Severity: Inspect soonP2127
The signal from the second accelerator pedal position sensor (sensor E) is below its normal range
Severity: Inspect soonP0068
The airflow measured by the MAF or MAP sensor doesn't match the airflow the computer expects for the current throttle opening
Severity: Inspect soonP0222
The second throttle (or pedal) position sensor signal is reading lower than its circuit should ever allow, so the computer treats it as an open or shorted circuit
Severity: Inspect soonP0638
The electronic throttle is not reaching the position the engine computer asked for, so the throttle actuator control on bank 1 is out of its expected range
Severity: Inspect soonP2172
The engine computer has seen a sudden jump in airflow that the throttle position can't account for, which usually means air is leaking in somewhere
Severity: Inspect soonP2173
The engine computer has seen more airflow into the engine that the throttle position can't account for, which usually means air is leaking in somewhere
Severity: Inspect soonP1295
On Kia, the electronic throttle is in a power-management (limited power) fault
Severity: Inspect soonP2118
Throttle motor drawing the wrong amount of current
Severity: Inspect soonP2128
Accelerator pedal or throttle sensor E signal reading too high
Severity: Inspect soonP2176
Throttle closed position has not been learned
Severity: Inspect soonP1516
Throttle actuator control (TAC) module fault (GM)
Severity: Inspect soonP2107
The throttle actuator control module has reported an internal processor fault
Severity: Inspect soonP2121
The accelerator pedal or throttle position sensor "D" signal does not make sense compared with the other throttle signals
Severity: Inspect soonP0120
Throttle or pedal position sensor A signal outside its normal range
Severity: Inspect soonP0221
Throttle or pedal position sensor B signal outside its normal range
Severity: Inspect soonP1125
On Chevrolet, the accelerator pedal position sensors are faulty or disagree
Severity: Inspect soonP0124
Throttle or pedal position sensor A signal dropping out intermittently
Severity: Severity not verifiedP0220
The engine computer sees a signal from throttle or pedal position sensor B that does not make sense
Severity: Inspect soonP0223
Throttle or accelerator pedal position sensor B sends a signal that is too high
Severity: Inspect soonP0224
The engine computer sees a signal from throttle or pedal position sensor B that does not make sense, on and off
Severity: Inspect soonP0225
The computer sees a signal from the third throttle or pedal position sensor (C) that does not make sense for the conditions, so it flags a circuit fault.
Severity: Inspect soonP0226
The signal from the third throttle or pedal position sensor (C) is in range but does not match what the engine is doing.
Severity: Inspect soonP0227
The signal from the third throttle or pedal position sensor (C) is lower than the circuit should ever produce.
Severity: Inspect soonP0228
The signal from the third throttle or pedal position sensor (C) is higher than the circuit should ever produce.
Severity: Inspect soonP0229
The signal from the third throttle or pedal position sensor (C) drops out or jumps now and then rather than staying wrong.
Severity: Inspect soonP2100
The computer has detected an open circuit in the control wiring of the throttle motor
Severity: Inspect soonP2103
The computer sees a high voltage condition in the circuit that drives the throttle motor
Severity: Inspect soonP2108
The throttle actuator control module reports that its performance is not what the engine computer expects
Severity: Inspect soonP2299
Brake pedal and accelerator pedal signals disagree with each other
Severity: Severity not verified
Fuel pump and injectors
The fuel pump in the tank supplies fuel, often through a separate pump control module, and the injectors spray it into the engine on command from the engine computer.
P0463
The fuel level sensor signal is higher than its normal range
Severity: MonitorP129F
On GM vehicles, the fuel pump power control module reports that the fuel pump speed signal is incorrect
Severity: Inspect soonP008A
Pressure in the low-pressure fuel system (lift pump side) is too low
Severity: Inspect soonP0462
The fuel level sensor signal is lower than its normal range
Severity: MonitorP0464
The fuel level sensor signal changes erratically or drops out in a way a real fuel level can't
Severity: MonitorP0627
Fuel pump A control circuit open
Severity: Inspect soonP069E
Fuel pump control module requested MIL illumination
Severity: Inspect soonP2635
The engine computer has found that fuel pump A isn't delivering the flow or pressure it is being commanded to deliver
Severity: Inspect soonP018B
Fuel pressure sensor B not reading plausibly
Severity: Inspect soonP023F
Fuel pump control circuit fault
Severity: Inspect soonP228D
Fuel rail pressure higher than commanded
Severity: Inspect soonP0002
Fuel volume regulator circuit out of range or not performing
Severity: Severity not verifiedP0090
Fuel pressure regulator control circuit fault
Severity: Inspect soonP018C
Second fuel pressure sensor signal too low
Severity: Inspect soonP0193
Fuel rail pressure sensor signal too high
Severity: Inspect soonP0460
Fuel level sensor circuit fault
Severity: MonitorP0461
Fuel level signal not changing as expected
Severity: MonitorP2293
Fuel pressure regulator 2 not performing as expected
Severity: Inspect soonP0201
The engine computer has detected an electrical fault in the cylinder 1 fuel injector circuit
Severity: Inspect soonP0203
The engine computer has detected an electrical fault in the cylinder 3 fuel injector circuit
Severity: Inspect soonP025A
The engine computer has detected an open or faulty control circuit for the fuel pump module
Severity: Inspect soonP0007
Fuel shutoff valve A control circuit reading high
Severity: Severity not verifiedP0204
Cylinder 4 fuel injector circuit fault
Severity: Inspect soonP0207
Cylinder 7 fuel injector circuit fault
Severity: Inspect soonP107B
On Toyota and Lexus hybrids, fuel rail pressure sensor B reads out of range
Severity: Severity not verifiedP12A6
On Chevrolet, the fuel pump enable circuit voltage is not performing as expected
Severity: Inspect soonP0091
Fuel pressure regulator control circuit reading low (direct-injection fuel pump)
Severity: Inspect soonP0230
Fuel pump relay control circuit fault
Severity: Inspect soonP2285
Injector control pressure sensor circuit reading low (diesel)
Severity: Inspect soonP016F
Closed-loop fuel pressure control has run out of range with pressure too low
Severity: Severity not verifiedP0202
Fuel injector circuit fault on cylinder 2
Severity: Inspect soonP0176
Fuel composition sensor circuit fault
Severity: Severity not verifiedP0178
Fuel composition sensor signal is lower than the computer expects
Severity: MonitorP0179
Fuel composition sensor signal is higher than the computer expects
Severity: MonitorP0180
Fuel temperature sensor A circuit has a fault the computer can detect
Severity: MonitorP0181
Fuel temperature sensor A signal is out of the range the computer expects
Severity: MonitorP0182
Fuel temperature sensor A signal is lower than the computer expects
Severity: MonitorP0183
The engine computer sees a signal from fuel temperature sensor A that is higher than its limit, which reads as fuel colder than is realistic.
Severity: Severity not verifiedP0184
The engine computer sees the fuel temperature sensor A signal jump or drop out in a way real fuel temperature cannot.
Severity: Severity not verifiedP0185
The engine computer found a fault in the circuit of fuel temperature sensor B, fitted on engines that have two fuel temperature sensors.
Severity: Severity not verifiedP0186
The engine computer sees fuel temperature sensor B giving a reading outside the normal range or not behaving as expected.
Severity: Severity not verifiedP0187
Fuel temperature sensor B reports a voltage below the normal limit
Severity: MonitorP0188
The fuel temperature sensor B signal is higher in voltage than the computer expects, which it reads as unusually cold fuel
Severity: Severity not verifiedP0189
The fuel temperature sensor B circuit gives an on-and-off signal
Severity: MonitorP0194
Fuel rail pressure sensor signal dropping out intermittently
Severity: Severity not verifiedP0200
Fault in an injector circuit, cylinder not identified
Severity: Inspect soonP0205
Fault in the electrical circuit for the fuel injector on cylinder 5
Severity: Inspect soonP0206
Cylinder 6 fuel injector circuit fault
Severity: Inspect soonP0208
The engine computer found an electrical fault in the control circuit of fuel injector 8
Severity: Inspect soonP0209
The engine computer found an electrical fault in the control circuit of fuel injector 9
Severity: Inspect soonP0210
Fuel injector circuit fault on cylinder 10
Severity: Inspect soonP0211
A fault in the control circuit for the fuel injector on cylinder 11
Severity: Severity not verifiedP0212
The engine computer sees a fault in the fuel injector circuit for cylinder 12
Severity: Inspect soonP0213
Cold start injector 1 circuit fault
Severity: Severity not verifiedP0214
The engine computer found a fault in the second cold start injector circuit
Severity: Inspect soonP0216
Fuel injection timing control circuit fault
Severity: Severity not verifiedP0231
Low voltage in the secondary circuit that powers the fuel pump
Severity: Inspect soonP0251
Injection pump fuel metering control A malfunction (cam/rotor/injector), diesel
Severity: Severity not verifiedP0253
Injection pump fuel metering control A low (cam/rotor/injector), diesel
Severity: Severity not verifiedP0254
Injection pump fuel metering control A high (cam/rotor/injector), diesel
Severity: Severity not verifiedP0255
Injection pump fuel metering control A intermittent (cam/rotor/injector), diesel
Severity: Severity not verifiedP0256
Diesel injection pump fuel metering control B malfunction (cam, rotor or injector)
Severity: Severity not verifiedP0258
Diesel injection pump fuel metering control B low (cam, rotor or injector)
Severity: Severity not verifiedP0262
Cylinder 1 fuel injector circuit reads high voltage
Severity: Severity not verifiedP0263
Cylinder 1 is not contributing as much power as the other cylinders
Severity: Severity not verifiedP0264
Cylinder 2 fuel injector circuit reads low voltage
Severity: Severity not verifiedP0265
Cylinder 2 fuel injector circuit reads high voltage
Severity: Severity not verifiedP0266
Cylinder 2 is not contributing as much power as the other cylinders
Severity: Severity not verifiedP0267
Cylinder 3 fuel injector circuit reads low voltage
Severity: Severity not verifiedP0268
Cylinder 3 fuel injector circuit reads high voltage
Severity: Severity not verifiedP0269
Cylinder 3 is not contributing as much power as the other cylinders
Severity: Severity not verifiedP0270
Cylinder 4 fuel injector circuit reads low voltage
Severity: Severity not verifiedP0271
Cylinder 4 fuel injector circuit reads high voltage
Severity: Severity not verifiedP0272
Cylinder 4 is contributing less power than the others
Severity: Severity not verifiedP0273
Cylinder 5 fuel injector circuit reads low voltage
Severity: Severity not verifiedP0274
Cylinder 5 fuel injector circuit reads high voltage
Severity: Severity not verifiedP0275
Cylinder 5 is contributing less power than the others
Severity: Severity not verifiedP0276
Cylinder 6 fuel injector circuit reads low voltage
Severity: Severity not verifiedP0277
Cylinder 6 fuel injector circuit reads high voltage
Severity: Severity not verifiedP0278
Cylinder 6 is not contributing equally to engine power
Severity: Severity not verifiedP0279
Cylinder 7 fuel injector circuit reads low voltage
Severity: Severity not verifiedP0280
Cylinder 7 fuel injector circuit reads high voltage
Severity: Severity not verifiedP0281
Cylinder 7 is not contributing as much power as the other cylinders
Severity: Severity not verifiedP0282
Cylinder 8 fuel injector circuit reads low voltage
Severity: Severity not verifiedP0284
Cylinder 8 is not contributing as much power as the other cylinders
Severity: Severity not verifiedP0287
Cylinder 9 is not contributing as much power as the other cylinders
Severity: Severity not verifiedP0288
Fuel injector 10 circuit reads low
Severity: Severity not verifiedP0289
Fuel injector 10 circuit reads high
Severity: Severity not verifiedP0290
Cylinder 10 is not contributing as much power as the others
Severity: Severity not verifiedP0291
Fuel injector 11 circuit reads low
Severity: Severity not verifiedP0292
Fuel injector 11 circuit reads high
Severity: Severity not verifiedP0293
Cylinder 11 is not contributing as much power as the other cylinders
Severity: Severity not verifiedP0296
Cylinder 12 is not contributing as much power as the other cylinders
Severity: Severity not verifiedP062A
Problem in the fuel pump control circuit, range or performance
Severity: Inspect soonP064A
The fuel pump control module reports a fault
Severity: Inspect soonP1233
On Ford vehicles, the engine computer cannot communicate with the fuel pump driver module, so the module is reported off line
Severity: Inspect soonP2067
Second fuel level sensor signal too low
Severity: Severity not verifiedP2068
The second (B) fuel level sensor circuit is reading higher than it should, so the fuel gauge may be wrong
Severity: Inspect soonP2291
Fuel pressure feeding the injectors is too low while the engine cranks
Severity: Severity not verifiedP2636
A second fuel pump (pump B) is not delivering enough fuel
Severity: Inspect soonP0285
Fuel injector circuit for cylinder 9 reads low voltage
Severity: Severity not verifiedP0294
Fuel injector circuit for cylinder 12 reads low voltage
Severity: Severity not verified
Hybrid and electric drive
Hybrids and electric vehicles add a high-voltage traction battery, an inverter that turns its direct current into alternating current for the drive motor, the motor-generators themselves and a DC/DC converter that charges the ordinary 12-volt system.
P0A43
Hybrid drive motor A position sensor signal cutting in and out
Severity: Inspect soonB273C
Digital crash input fault stored in the hybrid control processor (Jeep 4xe)
Severity: Inspect soonP0A78
The inverter that powers hybrid drive motor A is not performing as expected
Severity: Inspect soonP0AA6
The hybrid computer has detected high voltage leaking to the vehicle body
Severity: Inspect soonP0E15
The heater that warms the hybrid battery's coolant is not doing what the hybrid computer commands
Severity: Inspect soonP1E00
Chevrolet Volt: a hybrid control module has stored its own fault codes and is asking the engine computer to turn on the check engine light
Severity: Inspect soonP0A94
The hybrid system has detected a performance fault in the DC/DC converter inside the inverter assembly
Severity: Inspect soonP0A93
Hybrid inverter cooling system performance problem
Severity: Severity not verifiedP0A0A
High-voltage interlock circuit fault: the hybrid system has lost its safety loop
Severity: Inspect soonP0A3F
Drive motor A rotor position sensor circuit fault
Severity: Inspect soonP0A80
Hybrid battery pack flagged for replacement
Severity: Inspect soonP0AC4
Hybrid control module asked the engine computer to turn on the check engine light
Severity: Inspect soonP1A90
On Hyundai and Kia electric cars, a fault in the integrated charging control unit (ICCU), which supplies power to the 12-volt system
Severity: StopP0A1E
Starter/generator control fault (on Ford hybrids, the belt-integrated starter generator)
Severity: MonitorP1A0C
On Ford hybrids, the hybrid powertrain controller disabled the engine (Stop Safely Now message)
Severity: StopP305F
Dual battery control module performance (Chevrolet Malibu eAssist)
Severity: Severity not verifiedP3190
Poor engine power on Toyota and Lexus hybrids
Severity: Inspect soonP0A08
The computer sees an open circuit on the status line from the DC/DC converter
Severity: Inspect soonP0A3E
A hybrid inverter on the generator or alternator side reached its temperature limit
Severity: Inspect soonP0A7A
The generator inverter is not performing as expected, or its fail signal looks wrong
Severity: Inspect soonP0A7F
The hybrid battery pack is worn or one of its modules has deteriorated
Severity: Inspect soonP0AE1
A fault in the hybrid battery precharge contactor circuit; Honda lists it as a bypass contactor fault
Severity: Inspect soonP1437
On Honda hybrids, a short circuit in the motor power inverter module
Severity: Inspect soonP3191
On Toyota hybrids, the engine did not start when the hybrid system asked it to
Severity: Inspect soonP1440
On Honda and Acura hybrids, motor power inverter module output circuit malfunction; on Toyota, secondary air injection control valve circuit, bank 1
Severity: Inspect soonP0A0F
The hybrid computer commanded the gasoline engine to start and the engine did not start
Severity: Inspect soonP0A1F
The battery energy control module, the computer that manages the high-voltage battery, has set an internal fault
Severity: Inspect soonP0A40
The control module sees the position sensor for drive motor A reading out of range or not matching the motor
Severity: Inspect soonP0A7C
The motor control electronics in a hybrid or EV, the inverter or power electronics, have passed their temperature limit
Severity: Inspect soonP0AA1
The hybrid or EV battery computer sees the positive high-voltage contactor still closed when it should be open
Severity: Inspect soonP0AA2
The hybrid or EV battery computer sees the positive high-voltage contactor stuck open, so the battery cannot power the car
Severity: Inspect soonP0B24
The hybrid or EV battery computer sees the voltage of the high-voltage battery jump around when it should be steady
Severity: Inspect soonP1B25
High-voltage battery path fault
Severity: Inspect soonP1B77
High-voltage battery precharging fault
Severity: Inspect soonP1C64
On Ram 1500 eTorque trucks, the hybrid system saw the engine turn slower than its target when stop-start tried to restart it
Severity: Inspect soonP31E7
Restart inhibition fault on Nissan electric vehicles
Severity: Inspect soon
Power steering and steering sensors
Most new vehicles use electric power steering: an electric motor on the column or rack adds force based on a torque sensor that measures how hard the driver turns the wheel.
B2278
Steering shaft torque sensor fault (Ford, Mazda)
Severity: Inspect soonC0545
Electric power steering torque sensor fault (GM)
Severity: Inspect soonC2217
Electric power steering module internal fault (Chrysler, Dodge, Jeep, Ram)
Severity: Inspect soonC1277
Steering wheel angle sensor circuit failure (Ford, Lincoln)
Severity: Inspect soonC1B00
Steering angle sensor signal invalid or not calibrated (Ford, Lincoln)
Severity: Inspect soonC200D
Power steering motor rotation angle sensor fault, steering gear internal failure (Ford)
Severity: Inspect soonU2011
Manufacturer code: on Ford, U2011 is stored in the power steering control module and points to an internal electronic fault in the steering assist motor
Severity: Inspect soonC0460
Steering angle sensor signal invalid or not calibrated
Severity: Inspect soonC0561
Chassis system disabled because another module reported a problem
Severity: Severity not verifiedC056D
A control module reports an internal hardware fault
Severity: Inspect soonC0710
Steering wheel position sensor signal fault (GM)
Severity: Inspect soonC102D
Power steering control module fault with loss of assist (Ford)
Severity: Inspect soonC1260
Steering angle sensor signal error (Hyundai)
Severity: Severity not verifiedC1259
Steering angle sensor signal error (Hyundai)
Severity: Severity not verifiedC2205
Steering angle sensor internal fault (Jeep, Chrysler)
Severity: Inspect soonC1290
Steering torque sensor main signal fault (Hyundai)
Severity: Severity not verifiedC0455
Steering angle sensor fault (GM)
Severity: Severity not verifiedP0550
The computer is not getting a usable signal from the power steering pressure sensor or switch.
Severity: Inspect soonP0551
The power steering pressure signal is outside the range the computer expects.
Severity: Inspect soonP0552
The power steering pressure sensor signal is lower than the computer expects.
Severity: Inspect soonP0553
The power steering pressure sensor signal is higher than the computer expects.
Severity: Inspect soonP0554
The power steering pressure sensor signal drops out or comes and goes.
Severity: Inspect soon
Body electrical
Body electrical covers the modules and circuits outside the engine and chassis: the body control module, keys and the immobilizer, exterior and interior lighting, door locks, the instrument cluster and the power feeds to these modules.
B2960
Passlock / theft-deterrent security sensor fault (GM)
Severity: Inspect soonB12C5
Engine start/stop switch failure (Honda, Acura)
Severity: Inspect soonB1325
Control module power circuit fault (GM)
Severity: Inspect soonP0513
Immobilizer key not recognized (incorrect immobilizer key)
Severity: Severity not verifiedB162F
Right low beam headlamp control circuit fault (Jeep)
Severity: Severity not verifiedB101D
Control module internal hardware fault (Chevrolet and GMC; module varies)
Severity: Severity not verifiedP0070
Outside (ambient) air temperature sensor circuit fault
Severity: Severity not verifiedP0073
Outside (ambient) air temperature sensor circuit signal too high
Severity: MonitorP1626
On Chevrolet, GMC and Buick, the engine computer is not receiving the fuel-enable message from the theft-deterrent system
Severity: Severity not verified
Diesel emissions and glow plugs
Modern diesels clean their exhaust with a particulate filter (DPF) that traps soot and burns it off, and a selective catalytic reduction (SCR) system that sprays diesel exhaust fluid (DEF) to cut nitrogen oxides.
P0471
Exhaust pressure sensor reading not making sense
Severity: MonitorP20BA
Diesel exhaust fluid heater not performing as expected
Severity: Severity not verifiedP20EE
Diesel NOx catalyst not removing enough NOx
Severity: Inspect soonP2002
Diesel particulate filter not trapping soot well enough (bank 1)
Severity: MonitorP20B9
Diesel exhaust fluid heater circuit open
Severity: Inspect soonP2459
Diesel particulate filter cleaning cycles happen too often
Severity: MonitorP203B
DEF level sensor reading not plausible
Severity: Inspect soonP2609
Diesel intake air heater system performance fault
Severity: Inspect soonP205C
Diesel exhaust fluid tank temperature sensor reading too low (circuit low)
Severity: Severity not verifiedP207F
Diesel exhaust fluid quality or dosing performance is below what the computer expects
Severity: Inspect soonP2C7A
Diesel NOx catalyst (SCR) efficiency below threshold on bank 1, catalyst 2
Severity: Severity not verifiedP0380
The computer found a fault in glow plug circuit A on a diesel engine
Severity: Severity not verifiedP0381
The computer found a fault in the glow plug warning lamp circuit on a diesel engine
Severity: Severity not verifiedP0472
Exhaust pressure sensor signal reading too low
Severity: Severity not verifiedP0473
Exhaust pressure sensor signal reading too high
Severity: Severity not verifiedP0474
Exhaust pressure sensor signal dropping in and out
Severity: Severity not verifiedP203F
Diesel exhaust fluid level in the tank is too low
Severity: Severity not verifiedP205B
Diesel exhaust fluid tank temperature sensor signal out of range or not plausible
Severity: Severity not verifiedP20C1
The engine computer found an open circuit in the third (C) heater control circuit for the diesel exhaust fluid (DEF) system
Severity: Inspect soonP2200
Fault in the circuit of the bank 1 NOx sensor, the sensor that measures nitrogen oxides in the exhaust
Severity: Severity not verifiedP2463
Soot has built up in the diesel particulate filter beyond the limit the computer allows
Severity: Inspect soon
Secondary air injection
A secondary air system uses an electric air pump to blow fresh air into the exhaust for the first minute or two after a cold start, which helps the catalytic converter warm up quickly and burn off extra fuel.
P2440
Secondary air switching valve stuck open (bank 1)
Severity: MonitorP2442
Secondary air switching valve stuck open (bank 2)
Severity: MonitorP0411
Secondary air injection flow not as expected
Severity: MonitorP0418
Secondary air pump relay A circuit fault
Severity: Inspect soonP2441
Secondary air switching valve stuck closed (bank 1)
Severity: Severity not verifiedP0410
Secondary air injection system fault
Severity: MonitorP2445
Secondary air pump not running when commanded (bank 1)
Severity: MonitorP2432
Secondary air pressure sensor signal too low (bank 1)
Severity: MonitorP0491
Secondary air injection system is not moving enough air (bank 1)
Severity: Severity not verifiedP1445
On Toyota, secondary air switching valve No. 2 stuck closed (bank 2)
Severity: Severity not verifiedP2444
Secondary air injection pump stuck on (bank 1)
Severity: Severity not verifiedP1444
Secondary air switching valve No. 2 stuck open (Toyota, Lexus)
Severity: MonitorP2431
Secondary air system pressure or flow sensor reading out of range (bank 1)
Severity: Inspect soonP2433
Secondary air system pressure or flow sensor circuit reading too high (bank 1)
Severity: Inspect soonP1442
On Toyota, secondary air injection switching valve No. 2 stuck closed (bank 1)
Severity: Severity not verifiedP2443
Secondary air injection switching valve stuck closed, bank 2
Severity: Severity not verified
Intake manifold runner control
Some engines change the shape of their intake while running.
P2004
The engine computer has found that the intake manifold runner control on bank 1 is stuck open or not closing when commanded
Severity: Inspect soonP200A
The engine computer has found that the intake manifold runner or variable intake valve on bank 1 isn't moving or performing as commanded
Severity: Inspect soonP2015
The sensor that reports the position of the intake manifold runner flaps on bank 1 is giving a reading that doesn't match where the flaps should be
Severity: MonitorP2005
Intake runner flaps stuck open on bank 1
Severity: Severity not verifiedP1004
Short runner valve control or performance fault (Chrysler and Dodge)
Severity: Severity not verifiedP2017
Intake manifold runner position sensor signal too high (bank 1)
Severity: Inspect soonP2006
Intake runner control stuck closed (bank 1)
Severity: Severity not verifiedP2007
Intake runner control stuck closed (bank 2)
Severity: Severity not verifiedP2016
Intake manifold runner position sensor or switch signal too low (bank 1)
Severity: Severity not verifiedP2076
The position sensor on the intake manifold air control (tuning) valve is giving a reading outside the expected range
Severity: Severity not verified
Charging and starting
The alternator (generator) keeps the battery charged and powers the car while the engine runs, and on most newer cars the engine computer controls its output.
P1682
Engine computer’s two ignition voltage feeds disagree (GM)
Severity: Inspect soonP1604
Startability malfunction (Toyota and Subaru)
Severity: Inspect soonP2535
Ignition switch run/start signal reading high
Severity: MonitorP0560
The computer sees system voltage outside the range it expects
Severity: Severity not verifiedP0561
The computer sees system voltage that is not steady
Severity: Severity not verifiedP0563
The computer sees system voltage that is too high
Severity: Severity not verifiedP0615
Problem in the starter relay circuit
Severity: Inspect soonP0620
Generator (alternator) control circuit fault: the engine computer sees a problem in the circuit that controls how much the alternator charges
Severity: Inspect soonP0622
Alternator field control circuit fault: the engine computer sees a bad signal on the wire that tells the alternator how hard to charge
Severity: Inspect soonP2534
Voltage on the ignition switch run/start circuit read by the computer is too low
Severity: Severity not verifiedP0621
Generator (alternator) warning lamp control circuit is faulty
Severity: Inspect soon
Drivetrain, 4WD and AWD
Four-wheel-drive and all-wheel-drive systems send engine power to both axles through a transfer case, a power transfer unit or an electronically controlled coupling.
C14A7
All-wheel-drive power transfer unit actuator blocked or not moving (FCA)
Severity: Severity not verifiedC161E
Mitsubishi active center differential pump or relay fault
Severity: Severity not verifiedC140F
Final drive control module fault that disables 4WD shifting (Jeep)
Severity: MonitorC1477
Transfer case clutch over temperature (Jeep)
Severity: Severity not verifiedC1494
Power transfer unit fork position fault stored by the Jeep 4WD/AWD controller
Severity: Severity not verifiedC0631
Front axle disconnect actuator fault (Ford AWD)
Severity: Severity not verifiedC00A6
AWD module actuator fault, front axle disconnect or transfer case actuator (Ford and Lincoln)
Severity: Severity not verified
A/C (air conditioning)
The A/C system uses a compressor to circulate refrigerant, which absorbs heat from the cabin and releases it outside.
P0530
The A/C refrigerant pressure sensor circuit has an electrical fault
Severity: Severity not verifiedP0531
The A/C refrigerant pressure sensor signal is outside the expected range or performance
Severity: Severity not verifiedP0532
The A/C refrigerant pressure sensor is sending a signal that is too low
Severity: Severity not verifiedP0533
The A/C refrigerant pressure sensor is sending a signal that is too high
Severity: Severity not verifiedP0534
The A/C system has lost refrigerant
Severity: Severity not verified