I have a 2015 Lonestar 4x4 Eco with less than 20,000 miles on it. No other issues until 09-14-2016 when it shut down. After a week of shop investigating the issue they dropped the tank and found the same thing you just described here. They also added that my fuel filter was completely black...
I have a 2015 Lonestar 4X4 with little under 20,000 miles. I just put in shop last week to do Service electronic throttle, the bright red lightening bolt, the low oil pressure and engine light coming on and oh yeah it would not restart. So they are saying the high pressure diesel pump imploded...