B1800 Code: Meaning, Causes, and Symptoms | OBD2 Codes
B1800 – Lamp Turn Signal Front Output Circuit Short To Battery
B1800 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B1800 Possible Causes
Faulty Lamp Turn Signal,Lamp Turn Signal harness is open or shorted,Lamp Turn Signal circuit poor electrical connection,Faulty Body Control Module (BCM)
The Body Control Module (BCM) monitors the Lamp Turn Signal. The BCM sets the OBDII code when the Lamp Turn Signal is not to factory specifications.