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Oil Pressure Gauge Inaccurate Or Inoperative

WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
  1. If Instrument Panel Cluster (IPC) diagnostic system check has been performed, go to next step. If IPC diagnostic system check has not been performed, see INSTRUMENT PANEL CLUSTER (IPC) DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Connect scan tool to DLC and attempt to communicate with PCM. If scan tool communicates with PCM, go to next step. If scan tool does not communicate with PCM, go to diagnostic system check in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
  3. If scan tool shows that DTCs P0522 or P0523 are set in PCM, go to diagnostic system check in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If no PCM DTCs are set, go to next step.
  4. Using scan tool, select IPC SPECIAL FUNCTIONS. Perform gauge sweep. If oil pressure gauge moves from minimum to maximum and back to minimum reading, go to next step. If oil pressure gauge does not respond correctly, go to step  8 .
  5. Select IPC data display on scan tool. Monitor engine oil pressure. If scan tool displays correct engine oil pressure, go to next step. If scan tool does not display correct engine oil pressure, go to step  7 .
  6. Compare scan tool display and instrument panel cluster gauge engine oil pressure. If readings are within 10 psi (69 kPa), system is operating okay at this time. If readings are not within 10 psi (69 kPa), go to step  8 .
  7. Select PCM data display on scan tool. Monitor engine oil pressure. If scan tool displays correct engine oil pressure, go to next step. If scan tool does not display correct engine oil pressure, go to diagnostic system check in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
  8. Replace IPC. See INSTRUMENT PANEL CLUSTER (IPC)  under REMOVAL & INSTALLATION. After repairs, go to next step.
  9. Turn ignition off and reconnect all disconnected components and connectors. Turn ignition on. Go to GAUGE FUNCTION SYSTEM CHECK  under SYSTEM TESTS. If symptom still exists, return to step  2 .
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