help OBD code p0463

I just replaced the gas tank in my 98 Geo tracker. and cleaned the EGR valve. I had a rusted gas tank and a EGR code. Now when I started it up I am getting a code P0463 fuel sensor circuit high input. I also put in five gallons of gas and the gage read empty. I had problems with an air leak on the gage in the tank. Is it the gage that is giving the code or something else?

Thanks