Self-Diagnostic System: Notes
WARNING: This page is about a different car, the 1992 Oldsmobile Toronado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The Electronic Control Module (ECM) may also be referred to as the Powertrain Control Module (PCM) in some diagnostic charts and figures, terms may be used interchangeably.
For ECM (PCM) code charts, see G - PFI TESTS W/ CODES article in the ENGINE PERFORMANCE Section.