After my car sets for several hours, or almost always over night, the RFA system will not work. I can resynchronize the transmitter and then it will be O.K. but will sometimes act like it is the passive mode. If I turn the pasive mode on and then off again this seems to clear up the problem. I have replaced the battery in the transmitter, matched the transmitter to the vehicle several times, and often resynchronize the transmitter. Any ideas out there?