B2499 Code: Meaning, Causes, and Symptoms | OBD2 Codes
B2499 – Courtesy Lamp Output Failure
B2499 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B2499 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.