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.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Timing chain stretched or jumpedCommon
- Crank or cam sensor signal corruptedPossible
Parts involved
- Timing Chain
- Crankshaft Position Sensor
- Camshaft Position Sensor
P033F is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.