Yesterday, I went to start my card and noticed that my radio was locked and I had to use the code to unlock it as if the car battery had been disconnected which it had not been. I then drove about 15 minutes when the car completely shut off, engine dashboard and everything. It immediately came back on but it happened a second time and this time I had to put the car in park and start the car up which it turned on with no problems. Just wondering if this sounds like a very expensive issue and where do I start with getting this fixed?