B1390 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1390 – Ambient Light Control Module


B1390 Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light)


B1390 Possible Causes


Faulty Ambient Light Control Module,Ambient Light Control Module harness is open or shorted,Ambient Light Control Module circuit poor electrical connection,Faulty Body Control Module (BCM)


B1390 Description


The Body Control Module (BCM) monitors the Ambient Light Control Module. The BCM sets the OBDII code when the Ambient Light Control Module is not to factory specifications.