When did you purchase it?
So......no time within that four months or 7k miles was the oil ever checked?About 7k miles ago, or 4 months ago.
Since your signature is not filled out.....maybe you can do so.....so all of us will know what you drive.If the truck still runs well, then very unlikely.
That must be how you know so much about modern diesel emissions systems.
Hence the reason of my post #35.......Thank you. I’d been wondering the best way to respond to that. I think you nailed it