Crankshaft/Camshaft Loss Of Synchronization
The PCM has lost crank-to-cam synchronization — the relative phase between crankshaft and camshaft no longer matches the calibrated reference. Causes include a stretched or jumped timing chain, broken cam timing tooth, or sensor signal corruption.
Affected components
- Timing chain
- Crankshaft position sensor
- Camshaft position sensor
Common causes
- High likelihood: Timing chain stretched or jumped
- Medium likelihood: Crank or cam sensor signal corrupted
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- Reduced-power or limp mode may occur
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.