B1566 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1566 – Door Ajar Circuit Short To Ground

 

B1566 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B1566 Possible Causes

 

Faulty Door Ajar Switch,Door Ajar Switch harness is open or shorted,Door Ajar Switch circuit poor electrical connection,Faulty Body Control Module (BCM)

 

B1566 Description

 

The Body Control Module (BCM) monitors the Door Ajar Switch. The BCM sets the OBDII code when the Door Ajar Switch is not to factory specifications.