B1557 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1557 – Ignition Run/Start Circuit Short To Battery

 

B1557 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B1557 Possible Causes

 

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

 

B1557 Description

 

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