B1603 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1603 – Lamp Anti-Theft Indicator Circuit Failure


B1603 Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light)


B1603 Possible Causes


Faulty Lamp Anti-Theft Indicator,Lamp Anti-Theft Indicator harness is open or shorted,Lamp Anti-Theft Indicator circuit poor electrical connection,Faulty Body Control Module (BCM)


B1603 Description


The Body Control Module (BCM) monitors the Lamp Anti-Theft Indicator. The BCM sets the OBDII code when the Lamp Anti-Theft Indicator is not to factory specifications.