Possible Causes
| Possible Causes |
|---|
| ENGINE OIL DIRTY OR CONTAMINATED |
| INCORRECT ENGINE OIL VISCOSITY |
| INSUFFICIENT ENGINE OIL PRESSURE |
| VARIABLE CAM TIMING (VCT) CONTROL CIRCUIT OPEN OR SHORTED |
| GROUND CIRCUIT OPEN OR HIGH RESISTANCE |
| VARIABLE CAM TIMING SOLENOID |
| CAMSHAFT PHASER |
| IMPROPER ASSEMBLY OF CAMSHAFT/CRANKSHAFT TIMING CHAIN AND SPROCKETS |
| ENGINE OIL PRESSURE SENSOR OR CIRCUIT |
| ENGINE OIL TEMPERATURE SENSOR OR CIRCUIT |
| HIGH FRICTION IN CAMSHAFT OR OTHER VALVETRAIN COMPONENTS |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .