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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (2 Of 3)) >> Diagnostic Information and Procedures >> DTC P105A >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC P013F, P1040, P208A, P2083C, P208D, P214E, U010E is not set.
    • Go to next step : If DTC P013F, P1040, P208A, P2083C, P208D, P214E, U010E is not set 
  3. Perform the scan tool control function : Reductant Pump - 50%

    Verify the scan tool parameter :

    • Reductant Pump Control Circuit High Voltage Test Status = OK or Not Run
    • Reductant Pump Control Circuit Low Voltage Test Status = OK or Not Run
    • Reductant Pump Control Circuit Open Test Status = OK or Not Run
    • If not the specified state 

      Refer to : Circuit/System Testing

    • Go to next step : If the specified state 
  4. 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 
  5. All OK.
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