My fuel gauge reader isn't working anymore.
I was hoping if someone could help me out with process of
elimination to fixing this problem.

 

easy.
Download your cars FSM(factory service manual)
I don't use factory set ups so I don't know.

 

Very common problem its your gauge cluster, find a used one on ebay thats ur cheapest way out if your lucky it'll work. Or it could be just as bad as urs. A new one from nissan is $600. Some ppl buy several until they find a working one. I got one with 125k and it didnt work i found one for my friend with 55k and its works great. Im shopping for a low mileage one now

 

If it's not the dash gauge, then the fuel tank sender unit is bad. They aren't exactly cheap, either.

I would download the FSM and run the dash guage self diagnostic before I bought anything.

http://boredmder.com/FSMs/Nissan/Maxima/

 

99% of the time, it's the cluster. I bought an OEM sending unit from the stealership and put it in with the same results as the old sending unit.

 

i had this problem start on me recently. checked all the connections, check resistor ohms in the tank, routed the problem to the cluster. bought a cluster with 80,000 miles, and now it works