Locking the Doors with the Keyless Entry Keypad System
WARNING: This page is about a different car, the 2013 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
It is not necessary to enter the factory set or personal code prior to locking all doors. To lock all doors, touch and hold the 7/8 and 9/0 buttons at the same time for approximately 2 seconds.