P0018: Crankshaft Position — Camshaft Position Correlation (Bank 2 Sensor A)
Do not keep driving
Stop driving and arrange recovery. Do not treat this as a sensor fault without verifying the mechanical timing first.
What this code means
Correlation has failed on bank 2's A camshaft, usually the intake. On engines where each bank runs its own secondary chain, a fault confined to one bank points squarely at that bank's chain, guide and tensioner. Where both banks report correlation codes at once, look instead at the primary drive or at oil pressure common to both tensioners.
Likely causes
Start here
- Stretched timing chain · specialist
- Worn timing chain tensioner or guide · specialist
- Timing chain or belt out of alignment · specialist
- Worn camshaft phaser · specialist
Less common
- Faulty camshaft position sensor · moderate
- Low or dirty engine oil · easy
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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