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Home >> Chevrolet >> 2022 >> Tahoe PPV, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (4 Of 5)) >> Diagnostic Information and Procedures >> DTC P1255 >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC U18A2 is not set.
    • Go to next step: If the DTC is not 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. Perform the following action: 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
      • Go to next step: If the DTC is not set
    5. All OK.
    • Go to next step: If no condition exists 
  4. Perform the following action: 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

    • Go to next step: If the DTC is not set 
  7. All OK.
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