Passive Anti-Theft System (PATS)
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2007 Ford RV Cutaway, 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
The PATS prevents engine operation without the correctly encoded key. For additional information on the operation of this system, refer to the appropriate ANTI-THEFT article.