DTC P0571: Brake Switch A Circuit

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.

P0571 - BRAKE SWITCH A CIRCUIT

Description:	The purpose of this DTC is to check whether the brake switch has toggled or not during the key ON engine running (KOER) test.
Possible Causes:	Open or short in the brake pedal position (BPP) circuit Open or short in the stoplamp circuits Concern in module(s) connected to the BPP circuit Damaged brake switch Incorrectly adjusted brake switch
Diagnostic Aids:	Using the scan tool, check the BPP/BOO PID. The BPP/BOO PID should toggle on and off with brake pedal activation.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to PINPOINT TEST FD .