Diagnostic Trouble Codes: Notes

WARNING: This page is about a different car, the 1996 Oldsmobile Ninety-Eight and 1996 Buick Park Avenue. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: In following diagnostic tests, schematics are courtesy of General Motors Corp.

NOTE: Before clearing DTCs, perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK . Record FREEZE FRAME and FAILURE RECORDS for reference during testing. Data will be erased when DTCs are cleared.

NOTE: If VCM/PCM is replaced, NEW VCM/PCM must be programmed using special manufacturer's equipment.