B1939 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1939 – Air Bag Passenger Pressure Switch Circuit Short To Ground Fault

 

B1939 Possible Symptoms

 

Air Bag Warning Light ON

 

B1939 Possible Causes

 

Faulty Air Bag Passenger Pressure Switch,Air Bag Passenger Pressure Switch harness is open or shorted,Air Bag Passenger Pressure Switch circuit poor electrical connection,Faulty Restraint Control Module (RCM)

 

B1939 Description

 

The Restraints Control Module (RCM) monitors the Air Bag Passenger Pressure Switch. The RCM sets the OBDII code when the Air Bag Passenger Pressure Switch is not to factory specifications.