I think that's intentional and all cars do it. They read empty when there are a few gallons left as a reserve. The G35 has a ~20 gallon tank and reads empty with the fuel light on at about 4-5 gallons remaining. The same happened in a Toyota that I owned, in my wife's BMW, and in my other car as well - it's got a 10g tank and fuel light is on with 2g remaining.

 

now question when you unplug the harness going into the fuel pressure sender where do you go to release the pressure on the fuel line?

 

Pull the fuel pump fuse and run the car til it dies.

 

it's also bad to wait til you are empty to refill
i always refill at 50% on the ticker

 

I personally think using Trip A/B would be a great temporary fix. To clarify, is it really a recall?

 

Says who??

I've always refilled my cars when they're around 1/4 or less. Never had any issues, but these are other vehicles (Toyota's and Honda's).

 

Bumping the fuel gauge threads I used as reference:

I discovered my problem: On the float armature, there is a thin copper bracket/wire that sits behind the armature bracket and it is this copper bracket/wire that makes contact with the "piano board" that reads and sends the fuel level to the gauge. This bracket/wire has a thin copper wire that spools around the armature pivot point before threading through the armature bracket housing to where it is soldered.

My problem was two fold: 1. the copper bracket/wire was bent enough that it wasn't making full contact throughout the entire range of motion. 2. the spool of copper wiring from the bracket/wire was getting bound up on the armature mount housing and prevented the arm from moving. This somehow occurred while I was cleaning the circuit board and put it back into the tank.

So I tinkered with the copper bracket/wire by gently (I MEAN GENTLY!) bending and prying the bracket using fine tools such as picks and miniature need nose pliers until the contact point on the tip of the bracket/wire made strong contact with "piano board" throughout the entire range of motion. I then fiddled with the armature mounting point and bracket, seating, moving and reseating the armature arm mount until I could not feel anything binding up via the copper coil and there was no resistance to the armature arm moving throughout the range of motion.

I put it all back together and turned the car on to immediately see a working gas gauge. This fixed my non-working gauge immediately and fixed my P0463 code.