Well I got the truck back yesterday PM. Tank dropped and cleaned, lines flushed, new filters fresh diesel. No codes. I drove @ 5 miles I got the Water in fuel warning. drove another 10 miles to home and grained the separator. It did have some water maybe 1/2 - 3/4 cup. Restarted and got the same message plus Reduced engine power message. I have now drained the separator 10 times. No water what so ever. Still getting the same warning messages.
The sensor in the separator is a fuel temperature sensor. Should I change it?