B129A Code: Meaning, Causes, and Symptoms | OBD2 Codes

B129A – LIN Bus D Signal Invalid

 

B129A Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B129A Possible Causes

 

Faulty Driver Side Windshield Wiper Motor,Driver Side Windshield Wiper Motor harness is open or shorted,Driver Side Windshield Wiper Motor circuit poor electrical connection,Faulty Body Control Module (BCM)

 

B129A Description

 

The Body Control Module (BCM) monitors the Central Lock Switch Illumination Circuit. The BCM sets the OBDII code when the BCM receives invalid data from the Driver Side Windshield Wiper Motor over the LIN.