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Home >> Buick >> 2021 >> Envision Preferred, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Displays And Gauges >> Diagnostic Information and Procedures >> DTC P0461-P0464, P2066, P2067, or P2068 >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify the DTC P0461, P0462, P0463, P0464, P2066, P2067, or P2068 are not set
    • If DTC P0461, P0462, P0463, or P0464 are set 

      Refer to Primary Fuel Level Sensor Malfunction in Circuit/System Testing

    • If DTC P2066, P2067, or P2068 are set 

      Refer to Secondary Fuel Level Sensor Malfunction in Circuit/System Testing

    • Go to next step: If DTC P0461, P0462, P0463, P0464, P2066, P2067, or P2068 are not set 
  3. If equipped, verify the fuel level gauge sweeps when performing the scan tool P16 Instrument Panel Cluster Control Module Gauge Sweep control function.
    • If the fuel level gauge does not sweep 

      Replace the P16 Instrument Panel Cluster Control Module.

    • Go to next step: If the fuel level gauge sweeps 
  4. Verify the scan tool Fuel Level Sensor parameter is between 5 - 95% and varies with fuel level.
    • If not between 5 - 95% or does not vary with fuel level 

      Refer to Primary Fuel Level Sensor Malfunction in Circuit/System Testing

    • Go to next step: If between 5 - 95% V and varies with fuel level 
  5. Verify the scan tool Fuel Level Sensor 2 parameter is between 5 - 95% and varies with fuel level.
    • If not between 5 - 95% or does not vary with fuel level 

      Refer to Secondary Fuel Level Sensor Malfunction in Circuit/System Testing

    • Go to next step: If between 5 - 95% and varies with fuel level 
  6. All OK.
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