One problem related to mass air flow sensor has been reported for the 2005 Ford Freestar. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Ford Freestar based on all problems reported for the 2005 Freestar.
In the morning the vehicle battery had been drained and we had it towed to the dealer. They replaced the alternator. We picked it up and the check engine light came on. They said it was the mass air flow sensor and replaced it. Two weeks went by and one day the vehicle wouldn't start. We had it towed to the dealer and they said it was the mass air flow connector and replaced it. The next day the vehicle wouldn't start. We had it towed to the dealer and they said nothing was wrong. The engine always idles very rough and no one can correct it. It has stalled in traffic. I have done research and have been made aware of a problem with the pcm module on these vehicles. Apparently rain gets it and soaks the module causing all sorts of electrical and transmission problems. Ford is aware of the issue and has issued a service bulletin and repair kit for this problem, but no recall.