I just got a 2002 Dodge Neon SXT... Nothing special about this car. I am totally unaware of any sort of real security system but there is a panic button on my keyless entry... So I made a spare key for my parents house and this morning when my dad tried to use it, the key let him in the car, started the car, and then it would just stop running right after. He came in and got my original key, and now the car is fine. Wtf?!