1. Access mode $06 through the scan tool and look for any escalated misfire counts under Test Identification (TID) 53.
2. If any cylinders show an elevated misfire count, replace the Coil-On-Plug (COP) unit on that cylinder. Clear the PCM's adaptive memory and road test the vehicle for continued symptoms. Recheck mode $06 as necessary.
3. If mode $06 did not reveal any elevated misfire counts, monitor the alternator's diode pattern on the B(+) terminal of the alternator with the engine running, blower motor
running and headlights
turned on. Replace the alternator as necessary.
4. Access the OSS located on the top of the transmission
tailshaft housing and inspect the connector for a good connection.
The OSS contains a Grey/Red (GY/RD) wire which supplies it a ground and the signal circuit is a Dark Blue/Yellow (DB/YE) wire.
5. Measuring resistance of the OSS should indicate a reading of 781-1,979 ohms. If the sensor is open, replace it.
6. Check the DB/YE wire for an open circuit or short to ground between the sensor connection and PCM pin 84 and service the circuit as needed.