I am a heavy equipment mechanic and I had a 6.7 motor that was running fine untill lunch where the operator shut it off. After lunch it would not start, after 1.5 days of troubleshooting the injectors were replaced. The reasoning of the failure was water in the fuel. This machine has that detection for water in the fuel, also the customer wasn't running the correct filters. So I am trying to say,,, Filters are cheap compared to the injecters. After I replaced them I tore them apart to see the failure, and it was ( all six of them) stuck needles. Hope this is usefull.

 

X2 replace filters often (w/ correct micron rating)