Pulled these codes today:

P1475 (EVAP emission control leak detection pump (LDP) cicuit malfunction) P0441 (evaporative emission system: incorrect purge flow)

Problems:
RPMs dropping more than avg after letting go of gas

Squeal from vent on start up, but goes away after car warms up

There sounds like a small grinding noise from the rear in part from time to time (I've only heard it twice so it could be unrelated)

Smell from the vents (could be coolant because I do have a super small leak from the upper radiator hose)

Seems like there's more white smoke coming from my exhaust than usual

Possible causes:
I drove on empty and was like 100ft from running out of gas last week

I've run on empty a couple times over the past few months

Thanks in advance!