Try a resynchronization on the fob. Stand close to the vehicle and press and hold the lock and unlock buttons down at the same time for ten to fifteen seconds, you will hear the door locks cycle (lock/unlock) once the fob is recognized.
I cannot think of anything that has a blue/green light on it, unless it is some type of alarm bypass or after market add on like remote start or.
Do you think you could get a picture of it and your key fob and maybe it would give a better idea of what it is. You just click the add image button and upload it.
Friday, January 6th, 2017 AT 3:08 PM