Engine Controls - Basic Testing - 3.8L: Summary

If no faults were found while performing steps in BASIC DIAGNOSTIC PROCEDURES article, proceed to TESTS W/CODES - 3.8L article in the ENGINE PERFORMANCE section. If no hard codes are found in self-diagnostics, proceed to TESTS W/O CODES - GASOLINE article below for diagnosis by symptom (i.e., ROUGH IDLE, NO-START, etc.) or intermittent diagnostic procedures.