I think if Codrington can't go this week Ty Johnson would fill in admirably. Assuming a Bills win Codrington will likely be fine for the next week to assume his regular duties.
I don't think the game will come down to a muffed punt. If I have to say what is more likely I think the Bills blowing out the Broncos is more likely than them losing. If the Broncos are punting in general that is a bad thing because possessions are critical.