Circuit/System Description
WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
The electronic brake control module and the engine control module simultaneously control the vehicle performance. If the engine control module receives corrupt data from the electronic brake control module, DTC C1211 will set in the engine control module.