2012 Isx 2350 475 with codes 4726 and 0559

[ahrenbenjudah]

Oh. I just got a code 4691: Engine Injector Metering Rail 1 Cranking Pressure-Data Vaud but below normal operating range-moderately severe level.

I’m really starting to wonder if my lift pump crapped the bed.

The first “possible causes” is a malfunctioning fuel lift pump. Even if I couldn’t get cranking pressure, I would think my lift pump would provide the initial pressure to the rail for start up.