[Sew_Sumi]

You'll probably want to test it more, as this is likely to be something else. Test with more players, try respawn the car, try using someone elses car, to see if it is going to pick up that you aren't actually near it.

You also should mind out having too much on that one command. House and Business, no worries... But you could make the vehicle lock work off another command to make it more defined.