Yes no doubt that's why the guy I found worries me it's hard to trust someone who is basically remapping your truck. And there is no way I'm putting a problematic part back in my truck. I'm doing the delete I just don't want it to be a different issue based on the codes it's currently reading. Good thing is I live in Washington and after a certain year diesels don't need emissions testing. So long as I don't get pulled over by an ass hole cop no one cares around here.
Just please be very careful and discreet posting about deletes in this site or any for that matter. Bad men are watching.
Have you tried the original thing suggested? Prying the exhaust open pre dpf and seeing if it will idle?