B1559 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1559 – Door Lock Cylinder Circuit Failure

 

B1559 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B1559 Possible Causes

 

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

 

B1559 Description

 

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