P0340
Camshaft position sensor circuit fault (bank 1 or single sensor)
Severity: Inspect soonIgnition and engine position sensors codes
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. Faults here range from a code with no symptoms to a stall or no-start.
How these codes differ
- P0335 (crankshaft sensor A circuit) tends to be the most disruptive: the computer uses the crankshaft signal for engine speed, spark and misfire detection, so a failing sensor can cause misfire, stalling or a no-start. Camshaft sensor codes (P0340 bank 1 circuit, P0341 bank 1 range or performance, P0345 bank 2 circuit) affect how the computer works out cam timing and which cylinder is firing; depending on the engine they range from a hard start to a no-start.
- P0340 and P0345 are circuit codes (no signal or wrong signal type); P0341 means a signal is present but does not match what the crankshaft sensor says, which can be a sensor, a reluctor or a timing problem.
- Knock sensor codes (P0325 sensor 1 circuit, P0332 sensor 2 circuit low) report a problem in the sensor's circuit, not that the engine is actually knocking. They point to the sensor, its connector or its wiring first.
- P0351 is the control circuit for ignition coil A: an electrical fault in that coil's primary side, which is different from a misfire code that only reports the result (a cylinder that did not fire).
Codes that show up together
- P0340 or P0335 with P0016: fix the sensor circuit first, then check whether the cam-crank correlation code returns.
- P0351 with a misfire code on the cylinder that coil serves: the circuit code is the more specific lead, so test that coil and its wiring before the plug or injector.
Ignition and engine position sensors codes
P0335
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
Sources and review
- Final Regulation Order: 13 CCR §1968.2, Malfunction and Diagnostic System Requirements (OBD II), 2004 and subsequent model-year passenger cars, light-duty trucks and medium-duty vehicles (2015 amendments)
- Advanced Engine Performance Specialist Test (L1) Composite Vehicle Type 4 Reference Booklet
- What are the symptoms of a bad crankshaft sensor?
- Cam / Crank Sensors
- On-Board Diagnostic Trouble Codes (generic code title list)
- How to service ignition coils
- Last reviewed
- Written by
- Saurabh K.
- Editorial review
- Pending
- Technician review
- Technician review pending
This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error