I had a truck and camper and the truck would start itself in the middle of the night and run till it shut off, I think it was 15 minutes. Found out it was a faulty transmitter for the remote start. They replaced the receiver and said that was it, then it did it again. So I pulled the batteries out of the transmitters and by the process of elimination found out which one it was. Only good part was that I parked by my bedroom window and I sleep with the window open so when it started and I was home I would hear it.