I have a 2001 F250 7.3L with 240k. It just started acting up, while driving down the highway, lost power but engine never quit running but check engine, water in fuel and service engine soon all flashed. I had a mechanic put a snap-on scan tool and had a P0606 code he cleared it and it has done it again this time a P0606 code along with a P1211 code. Any advice would be great