About 1 or 2 times per week after I start the car then park and turn key off and remove it the motor stays running. Any ideas? We bought the car used with 7k miles on it. It did come with some sort of aftermarket key fob on it that only locks and unlocks the car. Not sure why someone would put a aftermarket fob on that only does that? There is also an antenna on the inside of the windshield that goes to the fob, hopefully that is unrelated and warranty will pay for it.