Hey all. I have a 06 F350 and today while driving it just shut down on me. I tried to restart it but to no avail. I towed it home and tried it again. It started but after about 10 secs it quit again. I got codes P0403, P0683 and P2623. It will sometimes start and even let me drive it but always after a short period of time it quits. I have good oil pressure and my egr valve is clean. Can someone help me with this problem. I have done the easy inexpensive check now I need some help fixing this. Thanks in advance.