B1738 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1738 – Mirror Driver Horizontal Switch Circuit Open

 

B1738 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B1738 Possible Causes

 

Faulty Mirror Driver Horizontal Switch,Mirror Driver Horizontal Switch harness is open or shorted,Mirror Driver Horizontal Switch circuit poor electrical connection,Faulty Body Control Module (BCM)

 

B1738 Description

 

The Body Control Module (BCM) monitors the Mirror Driver Horizontal Switch. The BCM sets the OBDII code when the Mirror Driver Horizontal Switch is not to factory specifications.