[hypoxia]

Richard,

I read that article 2 days ago. Scary. I didn't look at it when you sent the link, because the service rep here was approavhing me.  Looks like the problem was twofold. Bad sensor box for the DPF ( Diesel Particulate Filter - gov't mandated cork for your exhaust) and also wirong Newell made from the coach to this system. I asked to get a picture and I don't yet know if they'll give it to me. I'll wrap this up when they finish.

Here are some photos of the SCR on a Cummins coach.  Remove the shiny stainless cover between the engine & battery's & there it is, easy access.