Conditions for Setting the DTC
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. 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 0.25 V - For greater than 1 s
P057E
Brake Pedal Position Sensor=Signal noisy or erratic