B17A5 Code: Meaning, Causes, and Symptoms | OBD2 Codes
B17A5 – Halo Lamps Control Circuit Short To Ground
B17A5 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B17A5 Possible Causes
Faulty Ambient Lamp,Ambient Lamp harness is open or shorted,Ambient Lamp circuit poor electrical connection,Faulty Left Or Right Map Pocket Lamp,Faulty Left Or Right Door Handle Lamp,Faulty Cupholder Lamp,Faulty Body Control Module (BCM)
The Body Control Module (BCM) provides a battery voltage output to certain low-level lighting output lamps through the ambient lamp driver circuit. These lamps use a dedicated path to ground for illumination. The BCM sets the OBDII code when it detects a short to ground on the Ambient Lamp Driver circuit for more than two seconds.