C0040 HONDA – Brake Lamp Switch Failure

C0040 HONDA Possible Symptoms

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

C0040 HONDA Possible Causes

Faulty Brake Lamp Switch,Brake Lamp Switch harness is open or shorted,Brake Lamp Switch circuit poor electrical connection

C0040 HONDA Description

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