[xGE_97]

Bob,  see page 2 of this post https://newellgurus.com/showthread.php?tid=7452

Different engine, but a little insight into how Newell might have done some janky wiring in the same area.

Not saying this is your problem, but……..

Richard!! Thanks again!! I'll read that. I searched the site for aftertreatment and other things but didn't find anything.

So I just got the estimate from Orlando Freightliner for dropping the DPF system and re-installing it. $2856.88. I guess they looked at it and couldn't see the sensor box, so down it comes to look at it...... I looked for this and couldn't see anything myself, so I'm sure its buried......Its emissions, right?
I wonder about the cost of emissions repairs compared to the overall costs of engine maintenance. Makes ya wonder...