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Circuit/System Verification

WARNING: This page is about a different car, the 2018 Chevrolet Trax and 2018 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.

C0561 77 or C0561 78

  1. Ignition ON.
  2. Verify that no other DTCs are set.
    • Go to next step: If no other DTCs are set 
  3. Replace the K20 Engine Control Module.
  4. Verify the DTC does not set while operating the vehicle under the Conditions for Running the DTC.
    • If the DTC sets 

      Replace the K17 Electronic Brake Control Module.

    • Go to next step: If the DTC does not set 
  5. All OK.

C0561 79

  1. Ignition ON.
  2. Verify that no other DTCs are set.
    • Go to next step: If no other DTCs are set 
  3. Replace the K71 Transmission Control Module.
  4. Verify the DTC does not set while operating the vehicle under the Conditions for Running the DTC.
    • If the DTC sets 

      Replace the K17 Electronic Brake Control Module.

    • Go to next step: If the DTC does not set 
  5. All OK.
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