Possible Cause
- OCV malfunction.
- Low engine oil pressure.
- OCV spool valve stuck in retard position.
- Variable valve timing actuator is stuck in retard position.
- Following oil runners are clogged or have leakage:
- Between oil pressure switch and OCV.
- Between OCV and variable valve timing actuator.
- In variable valve timing actuator.
- Loose timing belt or improper valve timing due to jumping.
- PCM malfunction.