Update...Update...taking truck to a local Ford dealership next Thursday. Will explain situation again and show them Mattd's suggestions. Really hoping to get this resolved. Will update once I know more. Appreciate all the help. Thanks again @mattd. Have a great weekend all.
The Ford tech ran tests and checked everything. Looks like a bad PCM. They are ordering PCM and also changing crank case filter. Not cheap...but cheaper than a new rig. Next will consider fuel pump Update and Def delete (due to recent legislation).
I also had truck in years ago (6 years?) for dash going dim for random periods of time and truck center said it was my Scanguage causing it...I could never duplicate when at dealership. That was while under warranty and service guy said he would see if I can get any help towards PCM...probably not as Ford didn't help with 3rd upper oil pan out of warranty.
Appreciate the help...was hoping for a cheaper solution...but got to pay to play with these diesels...which are wonderful on a motorhome.
Make it a great day all.