my 2011 fiesta only came with one key/fob,the trick is hairgonejohn,have both keys in car,with the one that works,turn on/off 3/4 times till u hear the bleep,press a button on both keys,so they programme at the same time,then turn the key on/off again till u hear the bleep,then both keys should be programmed.
doing one at a time will wipe the other out,so u gotta do both at the same time