Years ago, on a 1,000 mile trip home from St. Anthony's sand dunes in Idaho, I had a similar problem.
The Cat's eye symbol appeared and then disappeared on several occasion. In St. George Utah, I stopped for Diesel and after filling up, the coach wouldn't start. The starter wouldn't engage.
Eventually with the help of my roadside service and after 5 hours of trying to start the coach, it ran and I made to Las Vegas at 2:00 AM. The next morning I called Allison in Las Vegas and they suggested that if the coach would start to take it home and have it checked out more local to my home.
Ultimately and after 5 days of trying to find the problem, Colton Truck Terminal, (authorized warranty station) discovered, by accident, that the wire bundle from the gear shift selector was rubbing against the generator enough to wear away insulation and cause a short circuit
They repaired the wires, zip tied the wire loom so it didn't touch anything and the problem was solved.
2016 Newmar Dutch Star 4369
Newmar Owners Club
USAF 1966-1969,- Law Enforcement 1969 - 2003, Retired since March 2003