Smart Unlock (without push button start)
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
The smart unlock feature prevents the doors from electronically locking with the key in the ignition lock cylinder. When the BCM receives a lock command from a door lock control switch and the key is detected in the ignition lock cylinder with one of the front doors open, the BCM commands the doors to unlock.
To override the smart unlock feature and intentionally lock the doors with the key in the ignition lock cylinder, close all doors and lock the vehicle by pressing the lock button on another valid programmed IKT, or with another key using the driver door lock cylinder.