Circuit/System Verification
WARNING: This page is about a different car, the 2012 Buick Verano. However, it is still accessible from the selected car via links, so may be relevant.
- Verify that DTC P0571 is not set.
- If the brake system or brake lights do not operate properly, refer to DTC P0571 .
- Verify that DTC P0703 is not set.
- If DTC P0703 is set, replace the K20 ECM. Clear the DTC and road test the vehicle. If DTC P0703 resets, replace the K9 BCM.