B1978 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1978 – Passengers Front Seat Down Switch Circuit Short To Battery

 

B1978 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B1978 Possible Causes

 

Faulty Passengers Front Seat Down Switch,Passengers Front Seat Down Switch harness is open or shorted,Passengers Front Seat Down Switch circuit poor electrical connection

 

B1978 Description

 

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