Getting an intermittent P0087/6238 Code

[GilliamOS]

Getting a "6238 - Fuel Rail/System Pressure, P0087 00 [096] - Too Low" code a couple times now. I replaced the pressure sensor back in February when I did my PCV stuff.

General consensus it's the DI/HPFP up front on the engine? How much of a PITA is that to replace? Should I get the cam roller too if/when I replace it? Any reason to go Hitachi over Delphi for it?

[GilliamOS]

Bump-age.