Conditions for Setting the DTC
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
The power steering control module detects a not plausible signal from the steering wheel angle sensor.
The power steering control module detected that the steering angle sensor reading and the direction of the vehicle exceeds 329 degrees.