I have a 2006 volvo xc90 2.5t and i’m currently having a huge amount of issue regarding three different issues all starting around the same timeframe of what i believed was overheating last summer on a 90 degree road trip resulting in stalling out in park after a rough idle.
A. my fuel gauge goes from where it should sit, to reading empty and i cannot figure out how to test it.
B. spurting from a P0089. i have zero fuel pressure at the rail. the fuel pump itself has been replaced and i’ve checked it today with a battery and two wires successfully, i’ve replaced the PEM and the fuel filter, and i’m receiving 12 volts from the wires connected to the pump itself. The fuel pressure sensor has been replaced as well but i’m running out of hope.
and C. I’m also running a P0700 code.

Anything contributed would be greatly appreciated thanks!

Update: I replaced the ECM and no change.