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.

Signal is erratic and changes faster than physically allowed.
Brake pressure signal does not correlate to estimated pressure over time.
Brake pedal position signal does not correlate to brake pressure signal.