Porsche-specific cam-to-crank correlation code for bank 1. The measured relationship between the bank 1 camshaft and the crankshaft is out of position - i.e. the cam timing has deviated. On the M96/M97 this usually accompanies VarioCam wear and chain stretch; a large deviation can indicate a serious timing error and warrants prompt investigation before driving hard.
SYMPTOMS
- Check-engine light
- Rough running / misfire feel
- Power loss
- Cold-start rattle
- Possible hard start
LIKELY CAUSES
- Cam timing deviation from worn VarioCam actuator/wear pads
- Stretched or jumped timing chain
- Failed chain tensioner/guides
- Sticking oil-control solenoid
- Cam/crank sensor or reluctor fault
DIAGNOSIS STEPS
- Compare commanded vs actual cam angle and cam-to-crank correlation in live data
- Check oil level/condition and cam-control solenoid operation
- Inspect timing chain for stretch and tensioner/guides for wear
- Verify cam/crank sensors and reluctor wheels
- Mechanically verify cam timing if deviation is large
RELATED PARTS
- VarioCam actuator / wear pads
- Timing chain / tensioner / guides
- Camshaft position sensor