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Oil Level Indicator Is On When Oil Level Is Okay

  1. If vehicle has been checked for Diagnostic Trouble Codes (DTCs), go to next step. If vehicle has not been checked for DTCs, go to appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
  2. If fuel gauge works properly, go to next step. If fuel gauge does not work properly, go to ALL GAUGES & INDICATORS (EXCEPT TURN SIGNALS, HIGH BEAM & SEAT BELT INDICATOR) INOPERATIVE  test.
  3. Disconnect engine oil level indicator switch connector. Turn ignition switch to RUN position. Connect a 3-amp fused jumper wire between engine oil level indicator switch harness connector terminal "A" (Brown wire) and ground. If low oil level indicator illuminates, go to next step. If low oil level indicator does not illuminate, go to step  7 .
  4. Turn ignition switch to OFF position. Disconnect Powertrain Control Module (PCM) Clear 80-pin connector C2. Turn ignition switch to ON position. If low oil level indicator illuminates, go to next step. If low oil level indicator does not illuminate, go to step  6 .
  5. Check for short to ground in circuit No. 1173 (Brown/White wire) between PCM connector C2, underhood accessory wiring junction block and instrument cluster Natural 18-pin connector C1. Repair as necessary and recheck system operation. If circuit is okay, replace instrument cluster. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. Recheck system operation.
  6. Check for poor connection or open in circuit No. 1174 (Brown wire) between PCM connector C2 and engine oil level indicator switch. Repair as necessary and recheck system operation. If circuit is okay, replace PCM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article in ENGINE PERFORMANCE. Recheck system operation.
  7. Connect a 3-amp fused jumper wire between engine oil level indicator switch harness connector terminals "A" (Brown wire) and "B" (Black/White wire). If low oil level indicator illuminates, go to next step. If low oil level indicator does not illuminate, go to step  9 .
  8. Check for poor connection at engine oil level indicator switch connector. Repair as necessary and recheck system operation. If connection is okay, replace engine oil level indicator switch. Recheck system operation.
  9. Repair poor connection or open in circuit No. 451 (Black/White wire) between engine oil level indicator switch and ground. Recheck system operation.
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