B2431 Code: Meaning, Causes, and Symptoms | OBD2 Codes
B2431 – Transponder Programming Failed
B2431 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B2431 Possible Causes
Faulty Transponder,Transponder harness is open or shorted,Transponder circuit poor electrical connection
The Body Control Module (BCM) monitors the Transponder. The BCM sets the OBDII code when the Transponder is not to factory specifications.