Faulty Brake Pedal Position (BPP) Switch (Stop Lamp Switch)
Misadjusted Brake Pedal Position Switch
Brake Pedal Position Switch harness is open or shorted
Brake Pedal Position Switch circuit poor electrical connection
Faulty Engine Control Module (ECM)
Engine Light ON (or Service Engine Soon Warning Light)
Brake lights inoperative
The Brake Pedal Position (BPP) switch is sometimes referred to as the stop lamp switch. The BPP switch provides a signal to the Engine Control Module (ECM) indicating the brakes are applied. The BPP switch is normally open and mounted on the brake pedal support. The Engine Control Module monitors the BPP switch. The Diagnostic Trouble Code (DTC) will set when the Engine Control Module did not receive a BPP switch input.