If the battery was out of the fob for a certain length of time the fob will need to be reprogrammed. DONT go to Fords as they charge a fortune and it only takes about 5 mins. U can find out how to do it on the tinterwebb, but not sure where.
U will also need the master key which is the one with the red transponder cap/cover on the end. Had my Focus key reprogrammed but a mate at a local garage who just happens to be Ford trained did it for me for FREE. If u get stuck i can ask him for the data sheet on how to do it. Keep us posted.
Hope this helps, Mark
BIG BOYZ WITH BIGGER TOYZ
Man who walk around with hands in pockets feel cocky all day !!!!!!!!
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