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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Controls And Fuel - 2.4L - DTC P0114 To DTC P0604) >> Diagnostic Information and Procedures >> DTC P0451-P0454: Fuel Tank Pressure Sensor >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Remove the fuel cap.
  2. Ignition ON, engine OFF.
  3. Verify the scan tool Fuel Tank Pressure Sensor parameter is between 1.3 and 1.7V.
    • If not between 1.3-1.7V 

      Refer to Circuit/System Testing

    • If between 1.3-1.7V 
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  5. Verify the DTC does not set.
    • If the DTC sets  

      Refer to Circuit/System Testing.

    • If the DTC does not set 
  6. All OK.
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