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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Engine Controls And Fuel - 5.3L (L83) Or 6.2L (L86) - DTC P0443 To DTC P3452 And Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P1255: Fuel Pump Control Module Driver High Temperature >> Circuit/System Verification

Circuit/System Verification

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

      Replace the K111 Fuel Pump Driver Control Module.

    • Go to next step: If the DTC does not set 
  6. All OK.
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