B1863 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1863 – Ground ECU Circuit Open

 

B1863 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B1863 Possible Causes

 

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

 

B1863 Description

 

The Body Control Module (BCM) monitors the Ground ECU Circuit. The BCM sets the OBDII code when the Ground ECU Circuit is not to factory specifications.