B131B Code: Meaning, Causes, and Symptoms | OBD2 Codes
B131B – Left Front Door Ajar Switch Circuit Open
B131B Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B131B Possible Causes
Faulty Left Front Door Ajar Switch,Left Front Door Ajar Switch harness is open or shorted,Left Front Door Ajar Switch circuit poor electrical connection,Faulty Body Control Module (BCM)
B131B Description
The Body Control Module (BCM) monitors the Left Front Door Ajar Switch. The BCM sets the OBDII code when the Left Front Door Ajar Switch is not to factory specifications.