Section 111 (Power Door Lock System & Remote Keyless Entry System): Programming: Notes
WARNING: This page is about a different car, the 2002 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
All Remote Keyless Entry (RKE) transmitters must be programmed at the same time. All Transmitter Identification Codes (TIC) will be erased when programming code is entered.