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Home >> Buick >> 2012 >> Regal Turbo, Standard Trans >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> Fuel Gauge Malfunction - DTC P0461-P0464 >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON, observe the scan tool ECM - Fuel Level Sensor parameter. The reading should be between 0.5-3.5 V and vary with fuel level.
  2. Ignition ON, if no DTC's are set, perform the Instrument Cluster Gauge Sweep test with the scan tool, verify that the fuel level gauge sweeps from its low to high position
    NOTE:

    If any DTC's are set the fuel gauge will not sweep.

    • If the fuel level gauge does not sweep, replace the P16 instrument cluster.
  3. Command the All Indicators test ON and OFF with the scan tool, verify that the low fuel level indicator turns ON and OFF.
    • If the low fuel level indicator always stays on or always off, replace the P16 instrument cluster.
    • If no fuel or communication DTCs are set, the fuel level gauge does sweep, and the low fuel level indicator turns ON and OFF, replace the K20 ECM.
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