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DTC P0504 - Brake Switch A/B Correlation

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P0504 - BRAKE SWITCH A/B CORRELATION

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