[fred cook]

My wife's 2013 Taurus won't let the doors lock if the electronic key (has pushbutton start) is in the car. If you try to lock the doors with the key inside, it will chirp and unlock the car. My 2012 Ford F150 has a similar routine. If you leave the key in the ignition and try to exit and lock the doors it will unlock them automatically. I haven't tried leaving the key on the seat or console and locking the doors. Both vehicles do have the pushbutton opening feature so that is also a backup way to get in. On the other hand, why would one want to leave a key in a car anyway? Just curious.