- Measure the engine oil level and fill, as required.
- Using the scan tool, inspect for diagnostic codes within the engine control module (ECM). Refer to Diagnostic System Check - Vehicle. Repair, as required.
- Verify proper engine oil pressure. Refer to
Oil Pressure Diagnosis and Testing.
- Inspect the camshaft position (CMP) actuator solenoid valve for proper operation. Refer to
Camshaft Position Actuator Solenoid Valve Inspection.
| • | If valve inspection confirms proper movement of the spool, replace the CMP actuator and CMP valve. |
| • | If valve inspection confirms improper movement of the spool, replace only the CMP valve. |
- Verify proper operation of the CMP actuator control system. Refer to
Diagnostic Starting Point - Engine Controls.
