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Home >> Buick >> 2018 >> Regal Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> Engine Oil Pressure Indicator Malfunction >> Circuit/System Verification

Circuit/System Verification

With UDD or UDC

  1. Verify correct engine oil level and condition.
  2. Ignition ON.
  3. Verify the engine oil pressure indicator turns on and off when commanding the All Indicators ON and OFF with a scan tool.
    • If the engine oil pressure indicator does not turn on and off. 

      Replace the P16 Instrument Cluster.

    • Go to next step: If the engine oil pressure indicator turns on and off 
  4. Verify the scan tool Engine Oil Pressure Sensor parameter is 0 psi (0 kPa).
    • If not 0 psi (0 kPa) 

      Refer to Circuit/System Testing.

    • Go to next step: If 0 psi (0 kPa) 
  5. Engine running.
  6. Verify actual engine oil pressure is within specified range. Refer to Oil Pressure Diagnosis and Testing  in Displays and Gauges Component Replacement Reference .
  7. Verify the scan tool Engine Oil Pressure parameter is within specified range.
    • If not within specified range 

      Refer to Circuit/System Testing.

    • Go to next step: If within specified range 
  8. Verify the engine oil pressure displayed on Instrument Cluster is within specified range.
    • If not within specified range 

      Test or replace the P16 Instrument Cluster.

    • Go to next step: If within specified range 
  9. All OK.

With UDV or UHS

  1. Verify correct engine oil level and condition.
  2. Ignition ON.
  3. Verify the scan tool Engine Oil Pressure Sensor parameter is 0 psi (0 kPa).
    • If not 0 psi (0 kPa) 

      Refer to Circuit/System Testing.

    • Go to next step: If 0 psi (0 kPa) 
  4. Engine running.
  5. Verify actual engine oil pressure is within specified range. Refer to Oil Pressure Diagnosis and Testing  in Displays and Gauges Component Replacement Reference .
  6. Verify the scan tool Engine Oil Pressure parameter is within specified range.
    • If not within specified range 

      Refer to Circuit/System Testing.

    • Go to next step: If within specified range 
  7. Verify the engine oil pressure displayed on Instrument Cluster is within specified range.
    • If not within specified range 

      Test or replace the P16 Instrument Cluster.

    • Go to next step: If within specified range 
  8. All OK.
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