Originally Posted by Kabigon
The Ford diagnostic system (IDS) that the dealers use is updated periodically (usually every 1 to 2 months).
When a new calibration (module firmware) is available, the IDS system "doesn't know about it" until it is updated to the latest revision.
Why did they "recall" the September update?
Nothing was wrong with the new PCM/TCM firmware. The problem was with the reflashing procedure used by the version of IDS that was current at that time. The next version of IDS (available in early October) fixed that problem.
Thanks for the information, your posts are always informative and reasoned rather than wild guesses.