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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 20 (Engine Controls And Fuel - 4.3L (LV1) - Diagnostic Information And Procedures (1 Of 2)) >> Diagnostic Information and Procedures >> DTC P0442 or P0455 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
WARNING:

Refer to : Fuel and Evaporative Emission Pipe Warning .

CAUTION:

Refer to : Clean, Dry, Low Pressure Gas Source Caution .

  1. Verify the following conditions do not exist :
    • Damaged, defective, or loose component :
      • Fuel Tank Filler Cap or Capless Type Fuel Fill
      • Evaporative Emission Canister Purge Solenoid Valve
      • Evaporative Emission Pipe - Kinked or Disconnected
      • EVAP Vent Solenoid Valve
      • Evaporative Emission Canister
      • If a condition exists - Repair or replace as necessary
      • Go to next step : If no condition exists
  2. 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.
  3. Verify the DTC does not set..
    • If the DTC sets 

      Refer to : Circuit/System Testing

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