Possible Causes
| Possible Causes |
|---|
| INCORRECT ENGINE OIL VISCOSITY OR OIL FILTER |
| CAM/CRANK LEARNED VALUES OUT OF TOLERANCE |
| ENGINE OIL AERATED OR CONTAMINATED |
| INSUFFICIENT OIL PRESSURE DUE TO A MECHANICAL FAILURE IN THE OILING SYSTEM |
| CAMSHAFT 1/2 OIL CONTROL VALVE FAULTY OR INTERMITTENTLY BINDING/STICKING SPOOL VALVE |
| CAMSHAFT TONE WHEEL MISALIGNED |
| CAMSHAFT 1/2 PHASER |
| TIMING CHAIN/SPROCKET ALIGNMENT |
| BROKEN OR FAULTY TIMING CHAIN TENSIONER OR GUIDES |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .