P033F — 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.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Timing chain
- Crankshaft position sensor
- Camshaft position sensor
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Timing chain stretched or jumped
- 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
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
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.