Camshaft position sensor codes

How its codes differ

• P0340 (bank 1) and P0345 (bank 2) are circuit codes: the computer sees no signal or the wrong kind of signal, pointing to the sensor, its connector or wiring.
• P0341 is a range or performance code: a signal is present but does not line up with the crankshaft signal, which can be the sensor, its target wheel, or the timing relationship itself.
• P0016 and P0017 compare the crankshaft with a camshaft and say they are out of their expected relationship. A faulty camshaft sensor can cause this, but so can a stretched or jumped timing chain or a VVT fault.

Codes

• P0340

  Camshaft position sensor circuit fault (bank 1 or single sensor)

  Severity: Inspect soon

• P0341

  Camshaft position sensor signal out of expected range (bank 1 or single sensor)

  Severity: Inspect soon

• P0345

  Camshaft position sensor A circuit fault (bank 2)

  Severity: Inspect soon

• P0016

  Crankshaft and intake camshaft positions do not agree (bank 1, sensor A)

  Severity: Inspect soon

• P0017

  Crankshaft and exhaust camshaft positions do not agree (bank 1, sensor B)

  Severity: Inspect soon

Signs it's failing

• Check engine light
• Hard starting or no-start
• Stalling
• Rough running

How to test it

1. Inspect the sensor's connector and wiring for damage, oil in the connector or chafing. (Use caution)

   Warning: Do this with the engine off; moving belts and the fan can cause serious injury.

2. Testing the signal with a scope or meter, or checking cam-to-crank timing, needs service information and is a job for a shop. (Best left to a shop)

   Warning: Timing checks involve rotating engine parts; leave them to a technician.

After the repair

• Clear codes and confirm the engine starts promptly from cold and hot.
• Check that correlation codes (P0016, P0017) have not returned after a drive.
• Clear codes only after the repair, then drive normally over several days with both city and highway driving so the readiness monitors can complete; clearing codes or disconnecting the battery resets them to not ready, which fails an emissions test.