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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 94 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (3 Of 3)) >> Diagnostic Information and Procedures >> DTC P268C-P268F >> 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.
  2. Verify that the ECM has the correct part number for the application.
  3. Verify that no other DTCs are set.
    • Go to next step: If no other DTCs are set 
  4. Perform the Fuel Injector Flow Rate Programming .
  5. 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.
  6. Verify that DTCs P268C, P268D, P268E or P268F do not set.
    • If DTCs P268C, P268D, P268E or P268F sets 

      Replace the K20 Engine Control Module.

    • Go to next step: If DTCs P268C, P268D, P268E or P268F do not set 
  7. All OK
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