Re: Help... my FEH / MMH has fallen and it can't get up.
It is definitely the MEC (electric motor coolant system) pump. Mine did the same thing on a thousand mile road trip to San Diego several times before dying on the way home in the middle of the Central Valley of California. It cost $600 to replace at the dealer. If you are at home with toolkit and jack stands, you can buy the pump itself for around $300 and do a relatively simple change out in about an hour.
Ford has an advisory notice about this problem, and there is a class-action lawsuit pending.