My wifes Freestyle's was chugging couple years back.. with a throttle body code.
I did a google search. came back with needs a throttle body. Did some digging.. ford's supplier for the throttle bodies went backrupt. the throttle bodies went bad. then they needed to find someone else to make them, without the mistakes..
I decided to take it off and try cleaning it.. It was pretty gummed/ carboned up..
MotoMaster Throttle body cleaner, old toothbrush, shop rags, and some pressured air from the air compressor.. throttle body looked as good as new, and she purred like a kitten again.