Circuit/System Verification
WARNING: This page is about a different car, the 2018 Buick Envision. However, it is still accessible from the selected car via links, so may be relevant.
- Verify that no DTCs are set, except DTC P158A.
- If any other DTC is set, except DTC P158A
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If only DTC P158A is set
- If any other DTC is set, except DTC P158A
- Reprogram the K9 Body Control Module and the K20 Engine Control Module one after the other. Do not place the Ignition On/Vehicle in Service Mode between each programming event.
- Verify DTC P158A does not set when operating the vehicle within the conditions for running the DTC.
- Go to next step: If the DTC does not set
- All OK.