O2 Sensor Problems of Ford Freestar

A few months ago my check engine light came on and vehicle felt like it wanted to stall out, the computer at the shop said that there was a misfire, replaced spark plugs and wires, light went out, 2 days later light back on same thing, shop could find nothing else wrong with the van, we then went to another shop who after having it for a week and not being able to figure out the problem said it was an oxygen sensor, paid $460 to have this replaced, van ran great for 3 days then lght back on and same thing, within 2 days the light went back off, this happened on and off for months then finally 3 weeks ago while turning a corner, the van just died and lost power in the middle of an intersection, unable to go into reverse or anything was able to restart the van long enough to get out of intersection then it died again and was able to coast to side of road but was unable to put van in reverse, my normal mechanic could not figure out the problem the computer kept reading different error codes , he then took it to the local dealer, where they have now had it for 3 weeks and are unable to find anything wrong with it, they did admit that they have been having problems with the pcm getting wet but they cannot find anything wrong with it, it is now running, going into reverse and no check engine light (at this time). I was also told that this could lead to eventual transmission problems as well, so now I have to worry about driving it at all, because noone can fix it, so it will eventually do it again???.

See all problems of the 2004 Ford Freestar 🔎.