2010 Ford Mondeo car lost power then cut out started again with engine management on not much power

I hope you've not run out of oil whilst driving, this can seriously damage the engine. your car is pretty new, do you not have any warranty on it, with the engine management light on, you'll need to have it computer diognosed.

sounds like its gone into limp mode you could spend hours second geussing get it into some one who has the diagnostic equipment it may work out cheaper in the end