Section 145 (Engine Control System - Self-Diagnostics - 4.6L): Summary
WARNING: This page is about a different car, the 2002 Cadillac Seville, 2002 Cadillac Eldorado, and 2002 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
If no hard fault DTCs are present, driveability symptoms exist or intermittent DTC(s) exist, proceed to appropriate TROUBLE SHOOTING - NO CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO-START, etc.) or intermittent diagnostic procedures.