Experienced random engine shutdowns and my service engine light came on. Got the codes read and this is what I came up with.
P1670
P0541
P0603
P0231
P1000

I think maybe I should attack the ECM but I'm no expert at deciphering auto codes to make a good choice.

 

Moved to the 7.3L PSD forum.

Stewart

 

I would start by checking batteries and the charging system. Low voltage can cause some strange things. If that all checks out, I think the PCM is suspect. Is there a possibility of swapping form another truck to be sure?