[reliable406]

Much more work needs done plugging in and reading codes is not all that needs doing live data needs consulted but given you have low pressure codes i would look at changing the fuel filter first.

You would then need to see the fuel pressure in live data to see if it is low from there it may be found that an injector is bad causing too much leak back or the regulator on the pump may be faulty it could be loads of things

Could even be a turbo issue but you dont say what engine you have so hard to say.