I have a 2002 Jeep Liberty. The Other morning my gas light came on. As I was driving to the gas station the needle moved all the way to full then right back to empty. I didn't think anything of it. I filled it up and when I got back in the needle didn't move. So now I go every 2 days and top it up because the needle still reads empty. What do I do???
Replace the fuel sensor / sending unit, it is inside the gas tank, it is a lot of work to drop the gas tank, I have done it on other cars... If you want to do it make sure the tank is almost empty it is very heavy with all that gas inside make sure there is no open flames or cigarretes close
Good Luck
SOURCE: Fuel gauge registers empty after fill up
It sounds to me like you have a short in your wiring harness at you fuel tank. there is a plug on top of your fuel tank that controls you fuel pump and your sending unit that tells you how much fuel is in the tank. This plug can be a real p.i.a to get to on some vehicles, you may have to take the vehicle to a shop to fix it, if you are not mechanically inclined.
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