Diagnosis Procedure
- CHECK PCV HOSE CONNECTION
Confirm that PCV hose is connected correctly.
Is the inspection result normal?
YES: GO TO 2.
NO: Repair or replace malfunctioning part.
- CHECK INTAKE AIR LEAKAGE
- Start engine and let it idle.
- Listen for an intake air leakage after the mass air flow sensor.
Is intake air leakage detected?
YES: Discover air leakage location and repair.
NO: Replace ECM. Refer to "REMOVAL AND INSTALLATION ".