Action in service
- If additional faults related to the following components are present, process these first: Pre-catalyst oxygen sensor, mass-airflow sensor, intake-manifold pressure sensor, intake-air temperature sensor, camshaft position sensor, high-pressure fuel system, low-pressure fuel system Check air-induction system for leaks (also checking the following components: Positive crankcase ventilation, oil cap, tank evaporative emissions system)
- Check exhaust system for leaks
- Replace injectors