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Home >> Buick >> 2017 >> LaCrosse Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls And Fuel - 3.6L (LGX) - DTC P0446 To DTC P3436 And Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P1255: Fuel Pump Control Module Driver Overtemperature >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition ON.
  2. Verify DTC P0231, P0232, or P023F is not set.
    • If none of the DTCs are set 
  3. Verify that the area where the K111 Fuel Pump Power Control Module is located is free of debris, clutter, or any insulating material that would cause the K111 Fuel Pump Power Control Module to overheat.
    • If any debris, clutter, or other material is found 
    1. Clear the area where the K111 Fuel Pump Power Control Module is located.
    2. Clear the DTC and test drive the vehicle.
    3. Verify the DTC does not set.
      • If the DTC sets, replace the K111 Fuel Pump Power Control Module.
      • If the DTC does not set
    4. All OK.
    • If no debris, clutter, or other material is found 
  4. Clear the DTC and test drive the vehicle.
  5. Verify the DTC P1255 does not set.
    • If DTC P1255 sets 

      Replace the K111 Fuel Pump Power Control Module.

    • If DTC P1255 does not set 
  6. All OK.
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