Diagnostic Trouble Codes: Notes

WARNING: This page is about a different car, the 1996 Pontiac Bonneville, 1996 Oldsmobile LSS, 1996 Oldsmobile Eighty-Eight, and 1996 Buick LeSabre. 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 appropriate BASIC TESTING article. 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.