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Engine mechanicalSeverity High: diagnose before driving on

P0018Crankshaft Position – Camshaft Position Correlation (Bank 2 Sensor A)

What it means

The camshaft position (bank 2, sensor A) is out of step with the crankshaft by more than allowed. The timing between crank and cam is wrong or one of the signals is distorted.

Symptoms

  • Rough running, stalling or hard start
  • Rattle from the timing chain
  • Loss of power

Common causes

  • Stretched timing chain or worn guides/tensioner
  • Timing belt or chain jumped a tooth
  • Faulty cam phaser stuck out of position
  • Damaged reluctor wheel or wrong sensor signal

What to check first

  1. Scope crank and cam signals together and compare with a known-good pattern
  2. Check the timing marks with the correct tools
  3. Read cam/crank deviation values if the scan tool shows them
Can I drive with P0018? Not recommended. P0018 can lead to stalling, limp mode or engine damage; diagnose it before driving further.

Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.

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P0018: questions and answers

What does P0018 mean?

P0018: Crankshaft Position – Camshaft Position Correlation (Bank 2 Sensor A). The camshaft position (bank 2, sensor A) is out of step with the crankshaft by more than allowed. The timing between crank and cam is wrong or one of the signals is distorted.

What are the symptoms of P0018?

Rough running, stalling or hard start. Rattle from the timing chain. Loss of power.

What causes P0018?

Stretched timing chain or worn guides/tensioner. Timing belt or chain jumped a tooth. Faulty cam phaser stuck out of position. Damaged reluctor wheel or wrong sensor signal.

How do you diagnose P0018?

1. Scope crank and cam signals together and compare with a known-good pattern 2. Check the timing marks with the correct tools 3. Read cam/crank deviation values if the scan tool shows them

Can I drive with P0018?

Not recommended. P0018 can lead to stalling, limp mode or engine damage; diagnose it before driving further.