Faulty Brake Pedal Switch
Brake Pedal Switch harness is open or shorted
Brake Pedal Switch circuit poor electrical connection
Faulty Powertrain Control Module (PCM)
Engine Light ON (or Service Engine Soon Warning Light)
Indicates that the brake input rationality test for Brake Pedal Position (BPP) and Brake Pressure Applied (BPA) switches has failed. One or both inputs to the Powertrain Control Module (PCM) did not change state when it was expected to. On vehicles with stability assist. BPP is connected to the ABS module and the ABS generates a Driver Brake Application (DBA) signal, which is then sent to the PCM.