Most likely thats it. When I turn the key off my Garmin has a message come up about will turn off in XX seconds. You can select to stay on but it automaticly goes off. My problem is not that. I can live with that. My problem is the cable I'm guessing will not allow my voice to go out over the intercom. I can hear the other person fine, but they tell me its just all static sounding when I try to talk. So my guess is I got a defective cord. If I just wanted to listen to the phone via the BT n the GPS I can just leave the 3.5mm cable plugged in, I didnt have to buy a $60+ cable to do that. I have tried to turn IC volume up, phone volume GPS volume and same results. I guess I got had on this purchase.