Circuit/System Verification
WARNING: This page is about a different car, the 2020 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition - On / Vehicle - In Service Mode
- Verify there are no other DTCs set, except for DTC P158A.
- If any other DTCs are set
- Go to next step: If no other DTCs are set
- Reprogram ECU - - K9 Body Control Module & K20 Engine Control Module
- Operate the vehicle within the Conditions for Running the DTC. - Verify the DTC does not set.
- Go to next step: If the DTC is not set
- All OK.
NOTE:
During the programming procedure, follow the Service Programming System (SPS) prompts for the correct ignition switch position.