'05 Aveo Hatchback- is it a lost cause?

[Eg.h2o]

If your fuel gauge seems accurate, I wouldn’t bother with the p0463.
if your rubber air snorkel that goes from your air box to the throttle body is cracked or split (common issue) you can get the other codes. Dirty throttle body can also give one of the codes.

[isotyph]

It's accurate for the most part! I will sometimes be driving and it'll bounce up and down- I left the house with 3/4 tank, it dropped down to say I had 1/4 tank, restarted the car and I was back up to 3/4. It's annoying but I think it should be fine.
Thank you, I'll have a look into both of those!

[Eg.h2o]

If you really want to fix the p0463, it’ll probably need either a fuel pump (with float level) or a new fuel gauge.....or just know how much gas you actually have.