B1806 Code: Meaning, Causes, and Symptoms | OBD2 Codes
B1806 – Lamp Tail Output Circuit Failure
B1806 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B1806 Possible Causes
Faulty Lamp Tail,Lamp Tail harness is open or shorted,Lamp Tail circuit poor electrical connection,Faulty Body Control Module (BCM)
The Body Control Module (BCM) monitors the Lamp Tail. The BCM sets the OBDII code when the Lamp Tail is not to factory specifications.