my '01 Sebring sometimes decides to lock the doors when I stop and hop out for a minute. I think it must have something to do with whether I open the door before or after I put it in park, but I'm not sure. Could it be a malfunction? Most of the time, it doesn't lock. The engine is still running. I've learned to make sure I put the window down before I do this now. It kind of sucks when your car locks your keys inside with the engine running.