Conditions for Setting the DTC
WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
P057B
Brake Pedal Position Sensor = Stuck in range - For greater than 1 s
P057C
Brake Pedal Position Sensor = Less than 0.25 V - For greater than 1 s
P057D
Brake Pedal Position Sensor = Greater than 4.75 V - For greater than 1 s
P057E
Brake Pedal Position Sensor = Signal noisy or erratic