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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (1 Of 3)) >> Diagnostic Information and Procedures >> DTC P02E0, P02E2, P02E3, P02EB, P122B, P122C, or P1425 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Engine at Idle
  2. Verify the scan tool parameter :
    • Intake Air Flow Valve Control Circuit Open Test Status = OK or Not Run
    • Intake Air Flow Valve Control Circuit Low Voltage Test Status = OK or Not Run
    • Intake Air Flow Valve Control Circuit High Voltage Test Status = OK or Not Run
    • Intake Air Flow Valve Control Circuit Shorted Test Status = OK or Not Run
    • If not the specified state 

      Refer to : Circuit/System Testing

    • Go to next step : If the specified state 
  3. Clear the DTCs.
  4. Ignition Off - For greater than 1 min
  5. Ignition - On / Vehicle - In Service Mode
  6. Verify DTC P02E0, P02E2, P02E3, P02EB, P122B, P122C, P1425 is not set.
    • If the DTC sets 

      Refer to : Circuit/System Testing

    • Go to next step : If the DTC does not set 
  7. 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.

    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 
  8. All OK.
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