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
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.