B2500 Code: Meaning, Causes, and Symptoms | OBD2 Codes
B2500 – Courtesy Lamp Output Check Short To Battery
B2500 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B2500 Possible Causes
Faulty Courtesy Lamp,Courtesy Lamp harness is open or shorted,Courtesy Lamp circuit poor electrical connection
The Body Control Module (BCM) monitors the Courtesy Lamp. The BCM sets the OBDII code when the Courtesy Lamp is not to factory specifications.