I had this problem before, took it to the dealership where I bought the vehicle and the Mykey function was turned off. I get into my vehicle days later and MyKey is activated on it's own. I will have to purchase a master to be able to reset the system I am told, this is such a pain. I believe the system is vunerable , there should be an recall concerning this. I love Ford vehicles, but I am not happy with this issue. I don't understand how my vehicle has functions beyond my control.