Service Engine Soon Indicator Stays On Or Flashes
- If vehicle has been checked for Diagnostic Trouble Codes (DTCs), go to next step. If vehicle has not been checked for DTCs, see appropriate TESTS W/CODES
article in ENGINE PERFORMANCE section:
- Disconnect Powertrain Control Module (PCM) Clear 80-pin connector C2. Turn ignition switch to RUN position. If SERVICE ENGINE SOON indicator illuminates, go to next step. If SERVICE ENGINE SOON indicator does not illuminate, see appropriate TESTS W/CODES
article in ENGINE PERFORMANCE section:
- Check for short to ground in circuit No. 419 (Brown/White wire) between PCM connector C2 and instrument cluster. Repair as necessary and recheck system operation. If circuit is okay, replace instrument cluster. See INSTRUMENT CLUSTER
under REMOVAL & INSTALLATION. Recheck system operation.