DTC P0703: Brake Switch B Input Circuit

WARNING: This page does not describe the selected car, but rather 24 other vehicles, including the 2013 Lincoln Navigator, 2013 Lincoln MKZ, 2013 Lincoln MKX, 2013 Lincoln MKT, and 2013 Lincoln MKS. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0703: BRAKE SWITCH B INPUT CIRCUIT

Description:	Indicates the PCM did not receive a brake pedal position (BPP) input.
Possible Causes:	BPP circuit open BPP circuit short to ground Damage in modules connected to the BPP circuit. Damaged brake switch Incorrectly adjusted brake switch
Diagnostic Aids:	Check for correct function of the stoplamps. Using a scan tool, check the BPP PID. The stoplamps and PID should turn ON and OFF with brake pedal activation.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
Expedition, Navigator	Verify the brake pedal was applied and released during the key ON engine running (KOER) self-test. For additional concerns, refer to the appropriate Vehicle Dynamic Systems article.
All others	GO to PINPOINT TEST FD .