B12C4 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B12C4 – Mirror Turn Indicator Circuit Short


B12C4 Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light)


B12C4 Possible Causes


Faulty Mirror Turn Indicator,Mirror Turn Indicator harness is open or shorted,Mirror Turn Indicator circuit poor electrical connection,Faulty Driver Door Module (DDM)


B12C4 Description


The Driver Door Module (DDM) monitors the Mirror Turn Indicator Circuit. The DDM sets the OBDII code when the Mirror Turn Indicator Circuit is not to factory specifications.