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P0504 - Brake Switch A / B Correlation

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
P0504 - BRAKE SWITCH A / B CORRELATION

Description:  The powertrain control module (PCM) does a comparison test between the brake pedal switch (BPS) and the brake pedal position (BPP) switch.
Possible Causes: 
  • Damaged brake switch
  • Open or short in the BPS circuit
  • Open or short in the BPP circuit
Diagnostic Aids:  Check the state of the BOO2 and BOO1 PIDs. The BOO2 PID is normally closed and BOO1 PID is normally open.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST AI .
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