P0021

2017-10-10

Description:

  • The fault code indicates a problem with the camshaft position timing system in bank 2. This may cause issues with engine performance, fuel efficiency, or may not allow the engine to start at all.

Possible Symptoms:

  • Check Engine Light (CEL) illuminated

  • Rough idling or stalling

  • Decreased engine performance or power

  • Engine misfires

  • Poor fuel efficiency

Possible Causes:

  • Faulty camshaft position sensor

  • Engine oil contamination (Thick oil)

  • low oil level

  • Oil control solenoid to the bank2 camshaft is clogged

  • Faulty camshaft timing actuator (Phaser) solenoid

  • Incorrect camshaft timing due to timing chain or belt issues

  • Faulty engine control module (ECM)

Related Parts:

  • Camshaft Position Sensor: The camshaft position sensor monitors the position of the camshaft to regulate fuel injection. Problems lead to stalling or car failing to start.

Possible Solutions:

  • Test and replace the faulty camshaft position sensor, if necessary

  • Ensure the engine oil is at the correct level and free from contamination

  • Test and replace the faulty camshaft timing actuator solenoid (Phaser), if necessary

  • Inspect and repair any timing chain or belt issues that may be causing incorrect camshaft timing

  • Test and replace the engine control module (ECM) if it is determined to be faulty

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