The Nissan Path

So,

I've had my pathfinder for about 4 or 5 years now, and I've finally gotten tired of just guessing my mileage based on how far I've driven.

I saw a topic from a couple days ago asking about a gas gauge not working, and there was no response, so i thought I'd try again.

So my question is, is there some relay/fuse/cable that will fix this issue, or is it something deeper that is harder to fix?

Thanks for all info guys!