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Home >> Chevrolet >> 2021 >> Bolt EV Premier >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (Programming And Setup) >> Repair Instructions >> K20 Engine Control Module: Programming and Setup >> Unsuccessful Programming Recovery
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Unsuccessful Programming Recovery

WARNING: This page is about a different car, the 2020 Chevrolet Bolt EV. However, it is still accessible from the selected car via links, so may be relevant.

If programming a control module is not successful, perform the following procedure:

  1. DO NOT turn the vehicle OFF. Ensure that all ECU, DLC and programming tool connections are secure and the TIS terminal operating software is up to date.
  2. Attempt to reprogram the ECU.
    • If the programming is not successful 
    1. Turn the vehicle OFF for at least 1 minute.
    2. Vehicle in Service Mode, attempt to reprogram the ECU.
      • If the programming is not successful - Replace the component: K20 Engine Control Module
      • Go to next step: If the programming is successful
    3. All OK.
    • Go to next step: If the programming is successful 
  3. All OK.
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