B1D04 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1D04 – Mirror Adjust Switch Input Circuit Performance


B1D04 Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light)


B1D04 Possible Causes


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


B1D04 Description


When the Driver Door Module (DDM) receives a mirror movement command from the switch but then senses an open or shorted circuit on one of the switch sense circuits for over 100 ms., this code will set.