C0040 Code: Meaning, Causes, and Symptoms | OBD2 Codes

C0040 – Brake Pedal Switch ‘A’


C0040 Possible Symptoms


Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)


C0040 Possible Causes


Faulty Brake Pedal Switch ‘A’,Brake Pedal Switch ‘A’ harness is open or shorted,Brake Pedal Switch ‘A’ circuit poor electrical connection


C0040 Description


The Anti-Lock Brake System (ABS) Module monitors the Brake Pedal Switch ‘A’. The ABS Module sets the OBDII code when the Brake Pedal Switch ‘A’ is not to factory specifications.