B1578 Code: Meaning, Causes, and Symptoms | OBD2 Codes
B1578 – Lamp Park Input Circuit Short To Ground
B1578 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B1578 Possible Causes
Faulty Lamp Park,Lamp Park harness is open or shorted,Lamp Park circuit poor electrical connection,Faulty Body Control Module (BCM)
The Body Control Module (BCM) monitors the Lamp Park. The BCM sets the OBDII code when the Lamp Park is not to factory specifications.