2012 Isx 2350 475 with codes 4726 and 0559

[ahrenbenjudah]

Well. I put the new head on. Everything back together and I'm still getting a crank/no start. Insite still says commanded pressure is 5k+ and rail pressure is <200.

What is the fuel rail pressure rationality sensor? That reads -1100.

I checked the new head before I put it on and it passed all of the tests that Cummins lays out for inspection.