Mazda OBD2 codes

B00A0 and the airbag light from low battery voltage while cranking

Supported by vehicle data

Mazda bulletin 08-001-20 links B00A0 and the airbag warning light on the CX-3 and CX-5 to low battery voltage during cranking, especially in colder weather. Have the battery and charging system tested first, and have the airbag system inspected by a qualified technician if the light stays on. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• B00A0: Occupant classification sensor or control unit fault

B1342 with the airbag warning light on

Supported by vehicle data

Mazda bulletin 08-003-08 lists B1342 with the airbag warning light on for some CX-7 and CX-9 vehicles below a VIN cut-off. The summary we read does not say what the code means or what the fix is, so a dealer should check whether your VIN is covered. Have the airbag system inspected rather than repaired at home. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• B1342: Control module internal fault (Ford, Lincoln)

B1495 as a LIN communication error after a trailer hitch install

Supported by vehicle data

Mazda bulletin SA-030-22 covers B1495 on 2020 to 2022 CX-9 as a LIN communication error after a trailer hitch is installed. On this Mazda it is not a seat belt sensor code. We read only the NHTSA summary. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• B1495: Belt tension sensor defect in the passenger occupant detection system (Hyundai and Kia)

B1881 listed with belt pretensioner codes

Supported by vehicle data

Mazda bulletin 0800203 lists B1881 together with a second code as safety belt pretensioner codes on 2001 to 2004 B-Series trucks. We only read the NHTSA summary, which names the codes but not a cause. The seat belt pretensioner is part of the airbag system, so have it inspected by a qualified shop. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• B1881: Passenger seat belt pretensioner circuit open or high resistance (Ford and Mazda)

B1881 listed as seat belt pretensioner codes

Supported by vehicle data

A Mazda bulletin lists B1881 together as pretensioner codes on 2001 to 2004 Tribute models. Only the NHTSA summary was read, and it names the codes without a fix. The pretensioner is part of the airbag system, so have it inspected by a qualified shop rather than repairing it yourself. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• B1881: Passenger seat belt pretensioner circuit open or high resistance (Ford and Mazda)

B1881 reported on the belt pretensioner circuit

Supported by vehicle data

An NHTSA owner complaint on a 2002 Mazda Tribute quotes a dealer estimate for B1881 stored with a passenger side belt pretensioner circuit failure and updated soldered connectors. Airbag work is safety-critical, so have the system inspected rather than repaired at home. The source is owner reports, not a confirmed repair, so this is labelled vehicle data and has not been independently verified.

• B1881: Passenger seat belt pretensioner circuit open or high resistance (Ford and Mazda)

B2278 from the steering shaft torque sensor on the Tribute

Supported by vehicle data

Mazda bulletin 06-001-14 covers B2278 stored in the power steering control module on 2008 to 2011 Tribute models, pointing to the steering shaft torque sensor. The bulletin was replaced by safety recall 7614E for the electric power steering, so ask a Mazda dealer whether that recall is open on your VIN and have the steering inspected. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• B2278: Steering shaft torque sensor fault (Ford, Mazda)

C0020 from the ABS pump motor brush on the Mazda3

Supported by vehicle data

Mazda bulletin 04-002-13 says that on 2010 to 2011 Mazda3 with DSC, the ABS pump motor brush can lose contact in high heat and humidity, setting C0020 with a network code and the ABS light. Mazda changed the brush material. Brakes are safety critical, so have the system inspected rather than repairing it yourself. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• C0020: ABS pump motor control circuit fault

P0015 from debris in the oil circuit

Supported by vehicle data

Mazda bulletin 01-009-16-3172B covers rough idle with the check engine light on and P0015 on some 2013 to 2016 Mazda models. The summary says a foreign object stuck on the oil pump pressure relief valve or oil control valve can cause low oil pressure and over-retarded exhaust cam timing. Check the oil level and condition first. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0015: Exhaust camshaft timing too far behind its target (bank 1)

P0022 with possible cam sensor codes

Supported by vehicle data

Mazda bulletin SB-01-038-09 covers cam timing codes including P0022 on the 2009 Tribute, which may appear together with cam sensor codes. The summary we read does not give the repair, so ask a Mazda dealer for the bulletin before replacing cam parts. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0022: Intake camshaft timing over-retarded, bank 2: the bank 2 intake camshaft is sitting later than the engine computer commanded

P0088 from a high-pressure fuel pump that cannot build pressure

Supported by vehicle data

Mazda bulletin 01-004-15-3028 says P0088 on the 2014 Mazda3 can come from a high-pressure fuel pump that does not build target pressure because of a manufacturing error in its internal parts. On the CX-5 and Mazda6 the same fault sets a different code. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0088: Fuel rail pressure higher than the engine computer wants

P011A from a restricted heater core

Supported by vehicle data

Mazda bulletin SA218 links P011A with overheating or no cabin heat on the 2013 to 2016 CX-5 to a restricted heater core. The bulletin compares heater performance with another CX-5 and, if heater core flow is restricted, replaces the coolant and the heater core. Owners report sensor jobs that did not cure it. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P011A: The two engine coolant temperature sensors disagree with each other

P011A on cold starts with a block heater

Supported by vehicle data

Mazda bulletin 01-015-15-3064A says that on some 2012 to 2016 Mazda models using a block heater, the warning light may come on with P011A below freezing. The cause is the computer's error-detection logic, and the fix is changing the control logic. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P011A: The two engine coolant temperature sensors disagree with each other

P0122 with the wrench light and reduced power

Supported by vehicle data

Mazda bulletin SB-01-007-13 covers the wrench light and check engine light with P0122 and related throttle and pedal codes on the Tribute, with intermittent reduced power. Only the bulletin summary was read, so it does not tell us the fix. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0122: The throttle position sensor A signal voltage is below its normal range

P0123 from electrical noise in the engine harness

Supported by vehicle data

Mazda bulletin SB-01-008-13 says P0123 on the Mazda6 can come from electrical noise in the engine harness, and Mazda adds a throttle body harness. Ask a dealer about the bulletin before replacing the throttle body. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0123: The throttle position sensor A signal voltage is above its normal range

P0126 from a false thermostat stuck-open reading

Supported by vehicle data

Mazda bulletin 01-010-13-2775 says P0126 can be set by PCM software that wrongly detects a stuck-open thermostat. It happens on highway driving right after a cold start at 14 to 32 F with maximum HVAC airflow, and the thermostat itself works normally. A second Mazda bulletin, SA-035-20, covers a thermostat that is stuck open. Check the coolant temperature reading before replacing the thermostat. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0126: Engine not reaching a steady operating temperature

P0126 from a thermostat stuck open

Supported by vehicle data

Mazda bulletin SA-017-21 covers P0126 on the 2018 Mazda3 when the thermostat is stuck open. Typical signs are a longer warm-up, a fluctuating temperature gauge, the blue light staying on and poor heater output at idle. Check the thermostat and how quickly the engine warms up first. Only the NHTSA summary was read, not the full bulletin. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0126: Engine not reaching a steady operating temperature

P0126 set by the thermostat monitor

Supported by vehicle data

Mazda bulletin 01-015-07 covers P0126 being set by the thermostat monitor on the 2007 RX-8. The NHTSA summary does not give the repair, so start by checking that the engine reaches normal operating temperature and that the thermostat opens and closes properly. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0126: Engine not reaching a steady operating temperature

P0132 with a sudden loss of acceleration

Possible — needs testing

One 2016 Mazda CX-9 owner complaint to NHTSA reports P0132 when the car would not accelerate, and the light went out after an hour. It is a single report with no cause given. The source is owner reports, and the link needs testing to confirm.

• P0132: Front oxygen sensor signal too high (bank 1, sensor 1)

P0191 from a high-pressure fuel pump that falls short of target

Supported by vehicle data

Mazda bulletin 01-010-14-2896 says P0191 on 2012 to 2014 Mazda3, CX-5 and Mazda6 can come from a high-pressure fuel pump that does not reach target pressure because of a manufacturing error in its inner parts. Mazda says production has been improved. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0191: Fuel rail pressure sensor reading does not make sense

P0192 from a high-pressure fuel pump that cannot build pressure

Supported by vehicle data

Mazda bulletin 01-010-14-2896B says P0192 on the 2014 Mazda3 can come from a high-pressure fuel pump that does not build target pressure because of a manufacturing error in its internal parts, since corrected in production. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0192: Fuel rail pressure sensor signal reads too low

P0202 with rough running and misfire codes

Supported by vehicle data

Mazda bulletin 01-017-16-3242 lists P0202 on the 2015 Mazda3 with rough running, as a fuel injector circuit fault on one cylinder. It says misfire codes are usually stored at the same time. We read only the NHTSA summary. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0202: Fuel injector circuit fault on cylinder 2

P0202 with rough running on the Mazda2

Supported by vehicle data

Mazda bulletin 01-004-17-3317A lists P0202 with rough running on the 2017 Mazda2, using the same wording as an earlier Mazda bulletin. We read only the NHTSA summary and it names no repair here. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0202: Fuel injector circuit fault on cylinder 2

P0204 with rough running

Supported by vehicle data

Mazda bulletin 01-017-16-3242 covers rough running with P0204 on the 2013 to 2016 Mazda3. We only read the NHTSA summary, so it gives no cause or fix. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0204: Cylinder 4 fuel injector circuit fault

P0222 from electrical noise at the throttle body on the Mazda6

Supported by vehicle data

Mazda 01-008-13 ties P0222 on the 2011 to 2013 Mazda6 to electrical noise at the throttle body. The listed fix is a throttle body harness with a diode. Ask a dealer about this harness before replacing the throttle body. We only read the NHTSA summary, not the full bulletin. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0222: 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

P0302 or P0303 under acceleration from a sticking exhaust manifold valve

Supported by vehicle data

Mazda bulletin 01-010/18 says that on early 2016 and 2017 CX-9s, P0302 or P0303 with a flashing light under acceleration can come from the exhaust manifold variable valve sticking closed when hot, not from a coil or plug. A flashing light still means stop until it is diagnosed.

• P0302: Misfire detected in cylinder 2
• P0303: Misfire detected in cylinder 3

P0461 stored with the light on, 2000 Mazda 626

Supported by vehicle data

Mazda bulletin 01000 says some 2000 Mazda 626 models may show the check engine light with P0461 stored. The NHTSA summary does not give the repair. Check the gas cap and EVAP system first. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0461: Fuel level signal not changing as expected

P0462 with a no-start while the gauge shows fuel

Supported by vehicle data

Mazda bulletin SA-013-25 covers an inaccurate fuel gauge with P0462 on the CX-70 and CX-90, where the car may not start even though the gauge shows fuel. Our notes link this to a faulty sub-tank sender, so ask a Mazda dealer for the bulletin before replacing the pump. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0462: The fuel level sensor signal is lower than its normal range

P0503 on the 2002 Mazda MPV

Supported by vehicle data

Mazda bulletin 0102502 covers the malfunction indicator light on with P0503 among a short list of stored codes on the 2002 MPV. The summary does not give a cause or repair. Only the NHTSA summary was read, not the full bulletin. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0503: The computer is getting a vehicle speed signal that is erratic, drops out, or reads too high

P0524 from debris in the oil control or relief valve

Supported by vehicle data

Mazda bulletin 01-009-16 links a rough idle with P0524 to a foreign object stuck at the oil pump relief valve or the oil control valve. Other Mazda bulletins on these models point to contaminated oil or PCM software. Check the oil level and condition first. The bulletin is published on NHTSA, but we have not confirmed it is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0524: Engine oil pressure too low

P05A0 from software on the active air shutter

Supported by vehicle data

Mazda bulletin 01-009-21-3799 says P05A0 on the 2019 to 2021 Mazda3 and CX-30 can set while the active air shutter is working. The cause is control software that sets the code at once instead of running its fail-safe, where the shutter cycles open and closed up to three times. The bulletin fixes it with a software change. We only read the NHTSA summary. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P05A0: Active grille shutter stuck or out of position: the motorised shutters in front of the radiator are not reaching their commanded angle

P0601 after slowing down in first gear

Supported by vehicle data

Mazda bulletin SB-01-018-13 covers the check engine light with P0601, an engine computer memory error, that sets just after decelerating in first gear on the 2013 MX-5. Mazda changes the engine computer's control logic, so ask a dealer about the update before replacing the computer. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0601: Control module internal memory checksum error

P061B with lack of power in high heat at altitude

Supported by vehicle data

Mazda bulletin 01-021-18 says P061B with lack of power can come from PCM logic whose torque calculation error grows in high heat at altitude. The fix is modified PCM software, so ask a dealer about the update before replacing parts. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P061B: Engine computer’s internal torque calculation check failed

P0638 from a frozen throttle after parking in the cold

Supported by vehicle data

Mazda bulletin 01-001-20 says the throttle on the 2016 to 2018 CX-9 can freeze after parking below freezing, causing lack of power with P0638. Note whether the problem only follows cold nights. The bulletin is published on NHTSA, but we have not confirmed it is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0638: 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

P0638 and P2112 with lack of power after parking in freezing weather

Supported by vehicle data

Mazda bulletin 01-001-18 covers lack of power with P0638 and P2112 after parking in freezing weather on the 2016 to 2018 CX-9. It points to condensation in the intake manifold. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0638: 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
• P2112: The engine computer commanded the electronic throttle to open but saw it stay more closed than expected

P064A that Mazda says can be stored with no driveability concern

Supported by vehicle data

Mazda bulletin 01-010/17 covers P064A, described as a fuel pump control module error, on 2016 to 2017 CX-9. It is detected when actual fuel pressure differs from target by 10 kPa or more while low-side pressure feedback stays high. The bulletin says there is no driveability concern, the check engine light does not come on, and the detection has been disabled in software. One 2017 owner reports a stall with the code. Only the NHTSA summary was read. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P064A: The fuel pump control module reports a fault

P0706 and P0707 or no crank from a pinched speed sensor wire

Supported by vehicle data

Mazda bulletin SB-05-006-09 links P0706 and P0707 and a no-crank condition on the 2009 Tribute to a pinched output shaft speed sensor wire or an intermittently shorted transmission range sensor. Check the speed sensor wiring for pinching and the range sensor connection first. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0706: Transmission range sensor signal out of range or not plausible
• P0707: Transmission range sensor circuit signal too low

P0722 with warning lights at start-up fixed by TCM logic

Supported by vehicle data

Mazda bulletin 05-004-15-3034C covers P0722 with the check engine and A/T warning lights at start-up on 2012 to 2014 Mazda3, Mazda6 and CX-5, and revises the transmission computer logic. Ask a dealer about the update before replacing the output speed sensor. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0722: No signal from the transmission output shaft speed sensor

P0752 with a shift solenoid circuit stuck on in the MPV

Supported by vehicle data

One owner of a 2002 Mazda MPV reports that a Mazda dealer diagnosed total transmission failure with P0752, a shift solenoid circuit stuck on. This is one owner report to NHTSA, not a bulletin, and it does not show that every case ends in a failed transmission. Have the solenoid circuit tested first. The source is owner reports and is labelled vehicle data rather than confirmed.

• P0752: Shift solenoid A stuck on

P0780 with the check engine and AT warning lights

Supported by vehicle data

Mazda bulletin 05-002-23 covers the check engine and automatic transaxle warning lights with P0780 alongside oil pressure switch codes on some 2012 to 2021 Mazda models, including the CX-5. Check the transmission fluid level first, then ask a dealer about the bulletin. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0780: Transmission did not complete a shift the way the computer expected

P0A7A fixed by starter generator software

Supported by vehicle data

Mazda bulletin 01-004-25 says some 2022 to 2023 Mazda3 and CX-30 may show battery and engine warning lights with P0A7A and another code, caused by overcurrent detection logic. The fix is integrated starter generator software. This is a mild hybrid system, not a full hybrid. Only the NHTSA summary was read, not the full bulletin. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0A7A: The generator inverter is not performing as expected, or its fail signal looks wrong

P0AA6 from the high-voltage water heater

Supported by vehicle data

Mazda warranty extension SSP D9 says the wire in the high-voltage water heater on the 2024 CX-90 PHEV and 2025 CX-70 PHEV may break, or its insulation may weaken, while warming the cabin in electric mode. The heater then works poorly, the hybrid warning light comes on and P0AA6 sets. Coverage is extended to 8 years with no mileage limit, so ask a Mazda dealer to check the VIN. We have not confirmed the extension is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P0AA6: The hybrid computer has detected high voltage leaking to the vehicle body

P111A and a high temperature light in extreme cold

Supported by vehicle data

Mazda bulletin 01-022-15-3083 names P111A as engine coolant temperature high on 2014 to 2015 Mazda3 models. The high temperature light comes on in extreme cold, with poor heater output and low coolant concentration. Production coolant concentration may not have been set correctly, causing freezing in extreme cold. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P111A: On Mazda, the engine coolant temperature has gone above its limit

P111A from cooling fan control software

Supported by vehicle data

Mazda bulletin 01-007-20-3691 ties P111A on the 2019 and 2020 CX-5 to overheating and weak A/C. The cause may be control module software that makes the cooling fan run improperly, and the fan control module is built into the fan. The bulletin does not apply if the concern happened at high speed. We only read the NHTSA summary. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P111A: On Mazda, the engine coolant temperature has gone above its limit

P111A with limp mode from high coolant temperature

Supported by vehicle data

A 2019 CX-9 owner complaint says a technician found P111A, described as engine coolant reaching 251.6 F and putting the engine in limp mode. A 2018 owner reports a coolant leak with a cracked cylinder head. The source is owner reports, not a confirmed fault pattern, so this is labelled vehicle data.

• P111A: On Mazda, the engine coolant temperature has gone above its limit

P1450 from the purge valve on the Mazda6

Supported by vehicle data

Mazda bulletin 01-012-14-2908A defines P1450 as unable to bleed up fuel tank vacuum on 2009 to 2013 Mazda6 and says the purge valve may be the cause. Mazda has modified the purge valve. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P1450: Fuel tank vacuum not bleeding off (Ford, Lincoln, Mazda)

P1744 before the transmission slipped or failed

Supported by vehicle data

Mazda 626 owners report dealers reading P1744 with a torque converter clutch stuck code on transmissions that later slipped or failed, and in one case the O/D OFF light blinked. Check the fluid and have the transmission looked at early. This comes from owner reports, not a bulletin, and has not been verified.

• P1744: Torque converter clutch slipping or not working as expected (Ford, Lincoln, Mercury, Mazda)

P1783 with a flashing O/D OFF light after highway driving

Supported by vehicle data

Mazda bulletin 0500502 covers a flashing O/D OFF light with P1783 after extended highway driving on the 1998 to 2001 Mazda 626. Owners report a cooling kit as the fix. We read only the NHTSA summary. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P1783: Transmission fluid over-temperature condition on Ford and Mazda automatics

P1783 with the A/T indicator lamp and cold-climate shift concerns

Supported by vehicle data

Mazda bulletin 0500504 covers the A/T indicator lamp on with P1783 and a related code, or cold-climate shift and engagement concerns, on 2001 to 2005 Tribute. We read only the NHTSA summary. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P1783: Transmission fluid over-temperature condition on Ford and Mazda automatics

P2004 from a stuck-open vacuum check valve

Supported by vehicle data

Mazda bulletin SB-01-012-09 says P2004 on the Mazda3 and Mazda5 can come from a vacuum chamber check valve stuck open, and Mazda supplies an updated check valve. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P2004: The engine computer has found that the intake manifold runner control on bank 1 is stuck open or not closing when commanded

P2006 covered by an emission recall

Supported by vehicle data

Mazda bulletin 09012007 covers P2006 on the Mazda6 and CX-7 under voluntary emission recall campaign 4807H, with a related campaign 4907H. Recall status should be checked by VIN. The summary we read is from NHTSA only, not the full bulletin. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P2006: Intake runner control stuck closed (bank 1)

P2006 from a tumble shutter valve that cannot close

Supported by vehicle data

Mazda bulletin 01-024/08 covers the warning light with P2006 when the variable tumble shutter valve cannot completely close, on 2004 to 2008 Mazda3 and Mazda5 models. Only the NHTSA summary was read, and it gives no repair. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P2006: Intake runner control stuck closed (bank 1)

P2104 and P2111 with a fail-safe speed limit on the CX-9

Supported by vehicle data

Mazda bulletin SB-01-045-10 covers P2104 and P2111 on the 2010 CX-9, where fail-safe mode may limit speed to about 20 to 25 mph. Our notes tie it to a throttle body fault. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P2104: The engine computer has forced the engine to idle as a fail-safe because of a throttle control fault
• P2111: The engine computer commanded the electronic throttle to close further but saw it stay more open than expected

P2107 with no start or lack of power

Supported by vehicle data

Mazda special program MSP04 reflashes the PCM for P2107 and related codes on some Mazda models, with engine no start or lack of power as symptoms. Check whether the PCM has had the reflash before replacing parts. We only have the NHTSA summary. We have not confirmed the program is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P2107: The throttle actuator control module has reported an internal processor fault

P2108 with no start or lack of power on the RX-8

Supported by vehicle data

Mazda special program MSP04 covers a 2004 RX-8 with no start or lack of power and P2108 among its codes. The repair in the summary is a PCM reflash. We read only the NHTSA summary. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P2108: The throttle actuator control module reports that its performance is not what the engine computer expects

P2112 after a sub-zero start on the 2023 Mazda3 and CX-30

Supported by vehicle data

Mazda bulletin 01-007-26 covers P2112 setting after a start in sub-zero temperatures on the 2023 Mazda3 and CX-30. Mazda's fix is a PCM reprogram, so ask a dealer about the update before replacing the throttle body. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P2112: The engine computer commanded the electronic throttle to open but saw it stay more closed than expected

P2119 at start-up, then limp mode

Supported by vehicle data

Mazda bulletin SB-01-024-10 covers P2119 at start-up followed by limp mode with reduced output on the 2007 CX-7. Our summary does not give the repair, so ask a dealer for the bulletin before replacing throttle parts. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P2119: The electronic throttle body's actual position doesn't match the position the engine computer expects

P2135 with rough idle or reduced power on the Tribute

Supported by vehicle data

Mazda bulletin 01-007-13 covers P2135, sometimes with other throttle codes, rough or low idle and reduced power on 2009 to 2010 Tribute models, and it concerns the throttle body assembly. Check the throttle body and its connector first. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P2135: Two throttle or pedal position sensor signals (A and B) that should agree with each other don't

P2177 and P2187 from a damaged air-fuel sensor harness cover on the CX-7

Supported by vehicle data

Mazda bulletin 01-009-13-2764 covers lack of power and a MIL with P2177 and P2187 on the 2007 to 2009 CX-7. It says brake fluid spilled on the air-fuel sensor harness cover can damage it and short the shield wire. Mazda set up a short cord with a shield wire for the repair. We only read the NHTSA summary. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P2177: 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
• P2187: Engine computer sees a lean mixture on bank 1 at idle: too much air for the fuel being delivered

P2177 or P2187 with the check engine light on

Supported by vehicle data

Mazda bulletin 03012005 covers the check engine light with P2177 or P2187 on 2004 to 2005 Mazda3 models. The NHTSA summary gives no cause or repair. A 2007 Mazda3 complaint reports the code with no repair found by a Mazda-trained mechanic. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P2177: 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
• P2187: Engine computer sees a lean mixture on bank 1 at idle: too much air for the fuel being delivered

P219B from electrical noise on the air-fuel sensor lines

Supported by vehicle data

Mazda bulletin 01-027-13 says P219B on the 2011 to 2013 CX-9 can come from electrical noise from the engine harness on the air-fuel sensor signal lines. Check the routing of those sensor wires before replacing the sensors. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P219B: The engine computer has detected that one or more cylinders on bank 2 are running a noticeably different air-fuel mixture from the others

P2299 with limp mode on a 2018 CX-5

Possible — needs testing

An NHTSA owner complaint on a 2018 Mazda CX-5 lists P2299 with other codes and limp mode. The owner says spark plugs and coils were replaced without fixing it. The text does not state what the code means, so the cause is not confirmed and it needs testing to confirm. The source is owner reports, not a diagnosis.

• P2299: Brake pedal and accelerator pedal signals disagree with each other

P2402 covered by an engine computer reflash program

Supported by vehicle data

Mazda special program MSP04, bulletin 0102204, reprograms the engine computer on the 2004 RX-8 for no start, lack of power and a set of codes that includes P2402. Ask a dealer whether the reflash has been done. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P2402: EVAP leak detection pump control circuit high

P250F with an oil level warning

Supported by vehicle data

Mazda bulletin 01-004/26 covers an oil level warning with P250F, supersedes bulletin 01-007/24, and refers dealers to Special Service Program SSPD5 for the valve stem seal class action. One owner reports the low oil light returning after the dealer repair. We read only the NHTSA summary. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P250F: The engine oil level signal says the oil is low

P250F with the engine oil level warning light on the CX-30

Supported by vehicle data

Mazda bulletin 01-003/23 covers the engine oil level warning light on with P250F. An owner of a 2021 to 2022 CX-30 cites this bulletin. Only the NHTSA summary was read, and it does not state a repair. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P250F: The engine oil level signal says the oil is low

P2757 with a fluid leak at the bell housing on the CX-9

Supported by vehicle data

Mazda bulletin 05-001-13 links the check engine and A/T lights with P2757, a torque converter clutch solenoid fault, to a transmission fluid leak between the engine and the bell housing on the 2007 to 2010 CX-9. The transmission computer goes into fail-safe and limits converter clutch control, so a shift shock may occur. Check for fluid at the bell housing and the fluid level first. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P2757: Torque converter clutch pressure control solenoid performance or stuck off

P3400 from oil filter wrapper debris

Supported by vehicle data

Mazda bulletin SA-047-21 says plastic from the oil filter wrapper, if it is pierced during an oil change, can travel through the engine and plug the cylinder deactivation oil control valve, setting P3400 on some 2016 to 2021 Mazdas. If the code appeared after an oil change, check that valve for debris first. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• P3400: Cylinder deactivation system, bank 1: the engine computer sees the hardware that shuts off cylinders on bank 1 not doing what it was told

U0151 from the head-up display stopping network traffic on the CX-3

Supported by vehicle data

Mazda bulletin 09-035-20 says multiple warning lights with U0151 stored on the 2018 to 2020 CX-3 come from the active driving display stopping CAN communication when its image processing becomes too complicated. Mazda modified the display software, so ask a dealer about it before replacing modules. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• U0151: Lost communication with the restraints (airbag) control module

U0155 from instrument cluster software

Supported by vehicle data

Mazda bulletin 15-001-19 says driver-assist and adaptive headlight warning lights with U0155 on the 2017 and 2018 CX-5 come from faulty instrument cluster software, and the fix is a software update. Ask a dealer for the update before replacing modules. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• U0155: Lost communication with the instrument panel cluster

U0401 with lack of power after interrupted cranking

Supported by vehicle data

Mazda bulletin 01-015-18 links U0401 with an engine computer code, lack of power and the check engine light on 2018 to 2019 CX-5 and other Mazda models to engine cranking being interrupted, most often by releasing the brake pedal while cranking. Automatic models also store another network code. Keep the brake pedal pressed until the engine starts, and ask a dealer whether the bulletin applies. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• U0401: A module received invalid data from the engine or powertrain computer

U0401 with driver support systems partially disabled

Supported by vehicle data

Mazda bulletin SA-008-20 covers the warning "Safety and Driver Support Systems Partially Disabled" with U0401 stored on the 2019 Mazda3. The summary we read does not give the fix, so have a Mazda dealer inspect it. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• U0401: A module received invalid data from the engine or powertrain computer

U0415 with the ABS light on the Mazda3

Supported by vehicle data

Mazda bulletin 04-002-13 covers the ABS warning light on 2010 to 2011 Mazda3 with DSC, with U0415 and an ABS motor monitor code stored. We only have a short summary, which does not give the fix. The ABS is a brake system, so have it inspected. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• U0415: A module received invalid data from the anti-lock brake (ABS) module

U0420 with the brake support warning right after start

Supported by vehicle data

Mazda bulletin 15-003-20 says the amber Smart Brake Support warning can come on right after start with U0420 in the forward sensing camera on 2017 to 2020 CX-5, CX-9, Mazda3 and Mazda6 models. It happens when battery voltage drops while cranking and the power steering module fails its steering centre learning. Mazda modified the steering module software; also have the battery checked. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• U0420: A module received implausible data from the power steering control module

U0423 that will not clear

Supported by vehicle data

Mazda bulletin MT-010-18 covers 2014 to 2019 models with Mazda Connect that store U0423 along with two other codes that cannot be deleted when the TPMS light flashes or the traction and stability lights are on. A related Scion bulletin words the code as invalid data received from the instrument panel cluster. Because the stability and ABS lights are involved, have it inspected by a qualified shop. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• U0423: A module received invalid data from the instrument panel control module

U0428 after a dash reset on the freeway

Supported by vehicle data

An owner of a 2012 Mazda3 told NHTSA that the dash reset on the freeway with the ABS light on, the radio cutting out and an unresponsive throttle for 2 to 3 seconds. An owner code reader showed U0428 with other network codes. Check the battery and ground connections first, and have the ABS and throttle behavior inspected. The source is a single owner report to NHTSA, not a confirmed diagnosis, so this is labelled vehicle data rather than confirmed by bulletin.

• U0428: 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

U0452 after a crash with the belt not engaging

Supported by vehicle data

A 2021 CX-30 owner complaint says that after a low speed crash the passenger belt did not engage until the passenger hit the dash. The body shop found U0452 read as invalid data from the restraints control module. Seat belts and airbags are safety systems, so have them inspected. The source is owner reports, not a confirmed fault pattern, so this is labelled vehicle data.

• U0452: A module received data from the restraints (airbag) control module that did not make sense

U3000 from the forward sensing camera

Supported by vehicle data

Mazda bulletin 15-001-25 covers i-ACTIVSENSE and ALH warning lights and system error messages with U3000 on 2019 to 2023 Mazda3, CX-30 and MX-30. Mazda describes it as an internal fault in the forward sensing camera, possibly a hardware failure. Have the camera checked by a dealer. We have not confirmed the bulletin is still current, so this is labelled vehicle data rather than confirmed by bulletin.

• U3000: Manufacturer code: on Ford, Honda, Acura and Mazda, the module that stored it found a fault inside itself

U3003 with a dead power liftgate

Supported by vehicle data

Mazda bulletin 1104M covers a power liftgate that does not work with U3003, low supply voltage at the liftgate module, on the CX-9, and says low battery voltage may be the cause. A later bulletin covers the CX-5. Test the battery and charging system before replacing the liftgate module. We have not confirmed the bulletins are still current, so this is labelled vehicle data rather than confirmed by bulletin.

• U3003: 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

B00A0: Occupant classification sensor or control unit fault

Severity: Inspect soon Full B00A0 guide

• CX-3 2016–2020 · Supported by vehicle data · 1 bulletin
• CX-5 2016–2020 · Supported by vehicle data · 1 bulletin

B1342: Control module internal fault (Ford, Lincoln)

Severity: Inspect soon Full B1342 guide

• CX-9 2007–2008 · Supported by vehicle data · 1 bulletin

B1495: Belt tension sensor defect in the passenger occupant detection system (Hyundai and Kia)

Severity: Inspect soon Full B1495 guide

• CX-9 2020–2022 · Supported by vehicle data · 1 bulletin

B1881: Passenger seat belt pretensioner circuit open or high resistance (Ford and Mazda)

Severity: Inspect soon Full B1881 guide

• B-Series Truck 2001–2004 · Supported by vehicle data · 1 bulletin
• Tribute 2001–2004 · Supported by vehicle data · 1 bulletin

B2278: Steering shaft torque sensor fault (Ford, Mazda)

Severity: Inspect soon Full B2278 guide

• Tribute 2008–2011 · Supported by vehicle data · 1 bulletin

C0020: ABS pump motor control circuit fault

Severity: Inspect soon Full C0020 guide

• Mazda3 2010–2011 · Supported by vehicle data · 1 bulletin

P0015: Exhaust camshaft timing too far behind its target (bank 1)

Severity: Monitor Full P0015 guide

• CX-5 2013–2016 · Supported by vehicle data · 1 bulletin

P0022: Intake camshaft timing over-retarded, bank 2: the bank 2 intake camshaft is sitting later than the engine computer commanded

Severity: Inspect soon Full P0022 guide

• Tribute 2009 · Supported by vehicle data

P0088: Fuel rail pressure higher than the engine computer wants

Severity: Inspect soon Full P0088 guide

• Mazda3 2014 · Supported by vehicle data · 1 bulletin

P011A: The two engine coolant temperature sensors disagree with each other

Severity: Monitor Full P011A guide

• CX-5 2013–2016 · Supported by vehicle data · 2 bulletins
• Mazda3 2012–2016 · Supported by vehicle data · 1 bulletin
• Mazda6 2014–2016 · Supported by vehicle data · 1 bulletin

P0122: The throttle position sensor A signal voltage is below its normal range

Severity: Inspect soon Full P0122 guide

• Tribute 2009–2010 · Supported by vehicle data · 1 bulletin

P0123: The throttle position sensor A signal voltage is above its normal range

Severity: Inspect soon Full P0123 guide

• Mazda6 2011–2013 · Supported by vehicle data · 1 bulletin

P0126: Engine not reaching a steady operating temperature

Severity: Monitor Full P0126 guide

• CX-5 2013–2019 · Supported by vehicle data · 2 bulletins
• Mazda3 2018 · Supported by vehicle data · 1 bulletin
• Mazda6 2014–2019 · Supported by vehicle data · 2 bulletins
• RX-8 2007 · Supported by vehicle data · 1 bulletin

P0191: Fuel rail pressure sensor reading does not make sense

Severity: Inspect soon Full P0191 guide

• CX-5 2012–2014 · Supported by vehicle data · 1 bulletin

P0192: Fuel rail pressure sensor signal reads too low

Severity: Inspect soon Full P0192 guide

• Mazda3 2014 · Supported by vehicle data · 1 bulletin

P0202: Fuel injector circuit fault on cylinder 2

Severity: Inspect soon Full P0202 guide

• Mazda2 2016–2017 · Supported by vehicle data · 1 bulletin
• Mazda3 2014–2016 · Supported by vehicle data · 1 bulletin

P0204: Cylinder 4 fuel injector circuit fault

Severity: Inspect soon Full P0204 guide

• Mazda3 2013–2016 · Supported by vehicle data · 1 bulletin

P0222: 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 soon Full P0222 guide

• Mazda6 2011–2013 · Supported by vehicle data · 1 bulletin

P0302: Misfire detected in cylinder 2

Severity: Inspect soon Full P0302 guide

• CX-9 2016–2017 · Supported by vehicle data · 1 bulletin

P0303: Misfire detected in cylinder 3

Severity: Inspect soon Full P0303 guide

• CX-9 2016–2017 · Supported by vehicle data · 1 bulletin

P0461: Fuel level signal not changing as expected

Severity: Monitor Full P0461 guide

• 626 2000 · Supported by vehicle data · 1 bulletin

P0462: The fuel level sensor signal is lower than its normal range

Severity: Monitor Full P0462 guide

• CX-90 2024–2025 · Supported by vehicle data · 1 bulletin

P0503: The computer is getting a vehicle speed signal that is erratic, drops out, or reads too high

Severity: Inspect soon Full P0503 guide

• MPV 2002 · Supported by vehicle data · 1 bulletin

P0524: Engine oil pressure too low

Severity: Stop Full P0524 guide

• CX-5 2013–2025 · Supported by vehicle data · 4 bulletins
• Mazda3 2012–2025 · Supported by vehicle data · 2 bulletins

P05A0: Active grille shutter stuck or out of position: the motorised shutters in front of the radiator are not reaching their commanded angle

Severity: Monitor Full P05A0 guide

• Mazda3 2019–2021 · Supported by vehicle data · 1 bulletin

P0601: Control module internal memory checksum error

Severity: Inspect soon Full P0601 guide

• MX-5 2013 · Supported by vehicle data · 1 bulletin

P061B: Engine computer’s internal torque calculation check failed

Severity: Inspect soon Full P061B guide

• CX-5 2013–2019 · Supported by vehicle data · 2 bulletins

P0638: 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 soon Full P0638 guide

• CX-9 2016–2018 · Supported by vehicle data · 2 bulletins

P064A: The fuel pump control module reports a fault

Severity: Inspect soon Full P064A guide

• CX-9 2016–2017 · Supported by vehicle data · 1 bulletin

P0706: Transmission range sensor signal out of range or not plausible

Severity: Inspect soon Full P0706 guide

• Tribute 2009 · Supported by vehicle data · 1 bulletin

P0707: Transmission range sensor circuit signal too low

Severity: Inspect soon Full P0707 guide

• Tribute 2009 · Supported by vehicle data · 1 bulletin

P0722: No signal from the transmission output shaft speed sensor

Severity: Inspect soon Full P0722 guide

• Mazda3 2012–2014 · Supported by vehicle data · 1 bulletin

P0752: Shift solenoid A stuck on

Severity: Inspect soon Full P0752 guide

• MPV 2002 · Supported by vehicle data

P0780: Transmission did not complete a shift the way the computer expected

Severity: Inspect soon Full P0780 guide

• CX-5 2013–2021 · Supported by vehicle data · 1 bulletin

P0A7A: The generator inverter is not performing as expected, or its fail signal looks wrong

Severity: Inspect soon Full P0A7A guide

• CX-30 2022–2023 · Supported by vehicle data · 1 bulletin
• Mazda3 2022–2023 · Supported by vehicle data · 1 bulletin

P0AA6: The hybrid computer has detected high voltage leaking to the vehicle body

Severity: Inspect soon Full P0AA6 guide

• CX-70 2025 · Supported by vehicle data · 1 bulletin
• CX-90 2024 · Supported by vehicle data · 1 bulletin

P111A: On Mazda, the engine coolant temperature has gone above its limit

Severity: Inspect soon Full P111A guide

• CX-5 2019–2020 · Supported by vehicle data · 1 bulletin
• CX-9 2018–2019 · Supported by vehicle data
• Mazda3 2014–2015 · Supported by vehicle data · 1 bulletin

P1450: Fuel tank vacuum not bleeding off (Ford, Lincoln, Mazda)

Severity: Monitor Full P1450 guide

• Mazda6 2009–2013 · Supported by vehicle data · 1 bulletin

P1744: Torque converter clutch slipping or not working as expected (Ford, Lincoln, Mercury, Mazda)

Severity: Inspect soon Full P1744 guide

• 626 1996–1997 · Supported by vehicle data

P1783: Transmission fluid over-temperature condition on Ford and Mazda automatics

Severity: Severity not verified Full P1783 guide

• 626 1998–2001 · Supported by vehicle data · 1 bulletin
• Tribute 2001–2005 · Supported by vehicle data · 1 bulletin

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 soon Full P2004 guide

• Mazda3 2004–2009 · Supported by vehicle data · 1 bulletin

P2006: Intake runner control stuck closed (bank 1)

Severity: Severity not verified Full P2006 guide

• Mazda3 2004–2008 · Supported by vehicle data · 1 bulletin
• Mazda6 2006–2007 · Supported by vehicle data · 1 bulletin

P2104: The engine computer has forced the engine to idle as a fail-safe because of a throttle control fault

Severity: Inspect soon Full P2104 guide

• CX-9 2010 · Supported by vehicle data · 1 bulletin

P2107: The throttle actuator control module has reported an internal processor fault

Severity: Inspect soon Full P2107 guide

• RX-8 2004 · Supported by vehicle data · 1 bulletin

P2108: The throttle actuator control module reports that its performance is not what the engine computer expects

Severity: Inspect soon Full P2108 guide

• RX-8 2004 · Supported by vehicle data · 1 bulletin

P2111: The engine computer commanded the electronic throttle to close further but saw it stay more open than expected

Severity: Inspect soon Full P2111 guide

• CX-9 2010 · Supported by vehicle data · 1 bulletin

P2112: The engine computer commanded the electronic throttle to open but saw it stay more closed than expected

Severity: Inspect soon Full P2112 guide

• CX-30 2023 · Supported by vehicle data · 1 bulletin
• CX-9 2016–2018 · Supported by vehicle data · 1 bulletin
• Mazda3 2023 · Supported by vehicle data · 1 bulletin

P2119: The electronic throttle body's actual position doesn't match the position the engine computer expects

Severity: Inspect soon Full P2119 guide

• CX-7 2007 · Supported by vehicle data · 1 bulletin

P2135: Two throttle or pedal position sensor signals (A and B) that should agree with each other don't

Severity: Inspect soon Full P2135 guide

• Tribute 2009–2010 · Supported by vehicle data · 1 bulletin

P2177: 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: Monitor Full P2177 guide

• CX-7 2007–2009 · Supported by vehicle data · 2 bulletins
• Mazda3 2004–2007 · Supported by vehicle data · 1 bulletin

P2187: Engine computer sees a lean mixture on bank 1 at idle: too much air for the fuel being delivered

Severity: Monitor Full P2187 guide

• CX-7 2007–2009 · Supported by vehicle data · 2 bulletins
• Mazda3 2004–2005 · Supported by vehicle data · 1 bulletin

P219B: 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 soon Full P219B guide

• CX-9 2011–2013 · Supported by vehicle data · 1 bulletin

P2402: EVAP leak detection pump control circuit high

Severity: Monitor Full P2402 guide

• RX-8 2004 · Supported by vehicle data · 1 bulletin

P250F: The engine oil level signal says the oil is low

Severity: Inspect soon Full P250F guide

• CX-30 2021–2022 · Supported by vehicle data · 4 bulletins
• CX-5 2021 · Supported by vehicle data · 4 bulletins
• CX-9 2021 · Supported by vehicle data · 4 bulletins
• Mazda3 2021–2022 · Supported by vehicle data · 4 bulletins
• Mazda6 2021 · Supported by vehicle data · 4 bulletins

P2757: Torque converter clutch pressure control solenoid performance or stuck off

Severity: Inspect soon Full P2757 guide

• CX-9 2007–2010 · Supported by vehicle data · 1 bulletin

P3400: 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 soon Full P3400 guide

• All models 2016–2021 · Supported by vehicle data · 2 bulletins

U0151: Lost communication with the restraints (airbag) control module

Severity: Inspect soon Full U0151 guide

• CX-3 2018–2020 · Supported by vehicle data · 1 bulletin

U0155: Lost communication with the instrument panel cluster

Severity: Inspect soon Full U0155 guide

• CX-5 2017–2018 · Supported by vehicle data · 1 bulletin

U0401: A module received invalid data from the engine or powertrain computer

Severity: Severity not verified Full U0401 guide

• CX-5 2018–2019 · Supported by vehicle data · 1 bulletin
• Mazda3 2019 · Supported by vehicle data · 1 bulletin

U0415: A module received invalid data from the anti-lock brake (ABS) module

Severity: Inspect soon Full U0415 guide

• Mazda3 2010–2011 · Supported by vehicle data · 1 bulletin

U0420: A module received implausible data from the power steering control module

Severity: Inspect soon Full U0420 guide

• CX-5 2017–2020 · Supported by vehicle data · 1 bulletin

U0423: A module received invalid data from the instrument panel control module

Severity: Severity not verified Full U0423 guide

• All models 2014–2019 · Supported by vehicle data · 1 bulletin

U0428: 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 soon Full U0428 guide

• Mazda3 2012 · Supported by vehicle data

U0452: A module received data from the restraints (airbag) control module that did not make sense

Severity: Inspect soon Full U0452 guide

• CX-30 2021 · Supported by vehicle data

U3000: Manufacturer code: on Ford, Honda, Acura and Mazda, the module that stored it found a fault inside itself

Severity: Inspect soon Full U3000 guide

• Mazda3 2019–2023 · Supported by vehicle data · 1 bulletin

U3003: 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 soon Full U3003 guide

• CX-9 2016–2021 · Supported by vehicle data · 2 bulletins

P0132: Front oxygen sensor signal too high (bank 1, sensor 1)

Severity: Monitor Full P0132 guide

• CX-9 2016 · Possible — needs testing

P2299: Brake pedal and accelerator pedal signals disagree with each other

Severity: Severity not verified Full P2299 guide

• CX-5 2018 · Possible — needs testing