Possible Causes
NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.
- Dirty or low engine oil
- Valve timing
- Oil control valve
- Variable valve timing control assembly
- Engine control module (ECM)
Description
The variable valve timing (VVT) system controls the intake valve timing according to driving conditions. The engine control module (ECM) controls the oil control valve (OCV) to perform correct intake valve timing. The oil pressure controlled by the OCV is supplied to the VVT controller, then the VVT controller changes the relative position between the camshaft and the crankshaft.
How to Repair
Check the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Check engine light on (or service engine soon warning light)