B1721 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1721 – Seat Driver Rearward Switch Circuit Failure

 

B1721 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B1721 Possible Causes

 

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

 

B1721 Description

 

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