C1291 Code: Meaning, Causes, and Symptoms | OBD2 Codes

C1291 – Open Brake Lamp Switch Contacts During Deceleration


C1291 Possible Symptoms


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


C1291 Possible Causes


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


C1291 Description


The stop lamp switch signal informs the Electronic Brake Control Module (EBCM) when the brake pedal is pressed. The EBCM sets the OBDII code when the Brake Lamp Switch is not to factory specifications.