2006 Cm 870 cold weather derate

[Ron1]

Is it safe to say that with the codes showing on insite but are listing as inactive, I have a bad delete? my guess is yes and someone has blocked off however the ecm sends the data to the MIL light. Per Trees post I pulled the plug on the EGR and it still flashes the check engine light, maybe they just forgot that line item. Im just trying to make sense of it all. I messaged running rough and I'll just wait for him to hopefully message back. Im sure he is super busy! It's starting to look like I got a really nice peterbilt dump truck with a motor that needs work. It runs really good goofed up. I can't imagine how it would run if all was functional.

Thx

Ron