F 550 4WD Super Duty V10-6.8L (2009)
From the scan tool, select: Ignition Key Code Erase and follow the on-screen instructions.
5. Turn the key to the OFF position and disconnect the scan tool (the key does not need to be removed at this time).
6. Turn the key to the ON position for a minimum of 3 seconds.
7. Turn the key to the OFF position and remove the key.
8. Insert the second key and turn it to the ON position for a minimum of 3 seconds.
9. Both keys start the vehicle.
10. If more keys are required to be programmed, refer to Key Programming Using Two Programmed Keys See: Accessories and Optional
Equipment/Antitheft and Alarm Systems/Testing and Inspection/Programming and Relearning/Key Programming Using Two Programmed Keys.
