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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 P0046, P2598, or P2599 >> 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 P003A, P0045, P0047, P0048, PP16FA, P16FC, 16B0, P16B1, P16B2, P169E, P169F, P2564, P2565 is not set.
    • Go to next step : If the DTC is not set 
  3. Verify the scan tool parameter : Turbocharger Vane Position Sensor = Greater than 80%
    • If not in the specified range 

      Refer to : Circuit/System Testing

    • Go to next step : If in the specified range 
  4. Engine - Idling
  5. Verify the scan tool parameter : Turbocharger Vane Position Sensor = 80 - 100%
    • If not in the specified range 

      Refer to : Circuit/System Testing

    • Go to next step : If in the specified range 
  6. Perform the scan tool control function : Turbocharger Vane Position - From 20 to 80% and back to 20%.

    Verify the difference between the following parameters is less than 15% :

    • Desired Turbocharger Vane Position
    • Turbocharger Vane Position Sensor
    • If the difference is greater than 15% 

      Refer to : Circuit/System Testing

    • Go to next step : If the difference is less than 15% 
  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 is not set 
  8. All OK.