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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 54 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (2 Of 3)) >> Diagnostic Information and Procedures >> DTC P0545, P0546, P2032, P2033, P242C, P242D, P2470, P2471, P2481, or P2482 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On / Vehicle - In Service Mode
  2. Verify the scan tool parameter: Exhaust Gas Temperature Sensor 1, 2, 3, 4, 5 = -39 to 999°C (-38 to 1, 30°F)
    • If not between -39 and 999°C (-38 and 1, 30°F) 

      Refer to: Circuit/System Testing

    • Go to next step: If between -39 and 999°C (-38 and 1, 30°F) 
  3. Verify the scan tool parameter: Exhaust Gas Temperature Sensor 1, 2, 3, 4, 5 = The value should not spike or drop out.

    Perform the action while monitoring the parameter:

    • Wiggle the harness and connector : B131 Exhaust Temperature Sensor
    • Wiggle the harness and connector : X3 @ K20 Engine Control Module
    • If the value spikes or drops out 

      Repair as necessary - Wiring / Terminal(s) / Electrical Connector (s)

    • Go to next step: If the value does not spike or drop out 
  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 is not set 
  5. All OK.
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