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Home >> Cadillac >> 2017 >> XT5 Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls And Fuel - 3.6L (LGX) - P0449 To DTC P3436 And Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P1255: Fuel Pump Control Module Driver High Temperature >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC P0231, P0232, P023F is not set.
    • If none of the DTCs are set 
  3. Verify the component location is free of debris, clutter or any obstruction that may reduce airflow which could cause an overheat condition:K111 Fuel Pump Driver Control Module
    • If a condition exists 
    1. Repair as necessary
    2. Clear the DTCs.
    3. Test drive the vehicle.
    4. Verify DTC P1255 is not set.
      • If the DTC sets - Replace the component:K111 Fuel Pump Driver Control Module
      • If the DTC is not set
    5. All OK.
    • If no condition exists 
  4. Clear the DTCs.
  5. Test drive the vehicle.
  6. Verify DTC P1255 is not set.
    • If the DTC is set 

      Replace the component:K111 Fuel Pump Driver Control Module

    • If the DTC is not set 
  7. All OK.
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