Section 4 (Engine Controls - Tests W/Codes): Summary
WARNING: This page is about a different car, the 1995 Ford Aspire. However, it is still accessible from the selected car via links, so may be relevant.
If no hard codes, or only pass codes, exist and driveability symptoms or intermittent codes still exist, proceed to TESTS W/O CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.