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)
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.