I looked into this when I got my 2019 and as I understand it:
- place key inside vehicle (I hide mine in the door handgrab when out hiking etc)
- lock the vehicle by pressing the 0-9 and 8-7 on the external key pad
- unlock the vehicle via keypad code or FordPass
This always worried me as 'break glass, find key inside, drive off', but I though I read somewhere that if I lock the key inside, then the truck knows that key is locked inside and the key is made 'inactive/unable' to start the vehicle unless the vehicle is unlocked via another means (keypad, Fordpass, 2nd key). Obviously a little hard to test.... has anyone tested this or know if this is really 'true'?