Disabling Unlimited Key Mode

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: By disabling the unlimited key mode with a random 8-digit number the previous access code no longer operates the vehicle.

Using a diagnostic tool, select PCM from the menu. Select SECURITY ACCESS to obtain security access. For additional information, refer to ANTI-THEFT SECURITY ACCESS .
Select: DISABLE UNLIMITED KEY MODE.
Select: PROGRAM UNLIMITED TRANSPONDER SECURITY KEY.
Enter an 8-digit random number (not 00000000 or 00000001).
Select: IGNITION KEY CODE ERASE.
Disconnect the diagnostic tool and turn the ignition key to OFF.
Program 2 keys to enable the vehicle.
Program any additional keys using either Key Programming Using Two Programmed Keys or Key Programming Using Diagnostic Equipment .