Oil Pressure Gauge Always Reads High (3.8L)
- If diagnostic system check has been performed, go to next step. If diagnostic system check has not been performed, perform INSTRUMENT CLUSTER DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.
- Start engine and observe oil pressure gauge. If oil pressure gauge does not indicate an acceptable level, turn ignition off and go to next step. If oil pressure gauge indicates an acceptable level, problem may be intermittent. Try to recreate fault by wiggling wiring and connectors. Check for faulty connections at all connectors that may be causing intermittent condition. See WIRING DIAGRAMS .
- Disconnect oil pressure sensor connector. Connect a 10-amp fused jumper wire between ground and Tan wire at oil pressure sensor connector. Turn ignition on. If oil pressure gauge indicates low oil pressure, go to next step. If oil pressure gauge does not indicate low oil pressure, go to step 8 .
- Turn ignition off. Disconnect jumper wire. Reconnect jumper wire between Tan wire and Black wire at oil pressure sensor connector. Turn ignition on. If oil pressure gauge indicates low oil pressure, go to next step. If oil pressure gauge does not indicate low oil pressure, go to step 7 .
- Check for faulty connection at oil pressure sensor connector. Repair connector as necessary. Recheck system operation. If oil pressure sensor connector is okay, go to next step.
- Replace oil pressure sensor. Recheck system operation.
- Repair open or poor connection in Black wire between oil pressure sensor and splice S110. See WIRING DIAGRAMS . Repair as necessary. Recheck system operation.
- Check for open or poor connection in Tan wire between oil pressure sensor and instrument cluster. Repair as necessary. Recheck system operation. If Tan wire is okay, go to next step.
- Replace instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Check system operation.