B1540 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1540 – Mirror Driver Switch Assembly Circuit Open


B1540 Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light)


B1540 Possible Causes


Faulty Mirror Driver Switch Assembly,Mirror Driver Switch Assembly harness is open or shorted,Mirror Driver Switch Assembly circuit poor electrical connection,Faulty Body Control Module (BCM)


B1540 Description


The Body Control Module (BCM) monitors the Mirror Driver Switch Assembly. The BCM sets the OBDII code when the Mirror Driver Switch Assembly is not to factory specifications.