Typically when a fuel gauge reads incorrectly it is the fuel sending unit in the fuel tank.In order to determine where the problem really is accessing the fuel sending unit on newer cars is fairly easy.Most have a access area either from removing the bottom of the back seat or from the trunk area under the carpet.In short if the fuel sending signal wire is grounded it should make the gauge either go back to empty or to the full mark IF it is not working properly.Just a simple check to verify if the part above is defective,or possibly your gauge itself has a electrical issue.I just recently fixed a exact issue as I have done before gauge read full and already knew the problem.
I have a problem with my 2 door Toyota rav4 2002 fuel gauge. it reads empty when in fact it is partly full. When filled up at pumps it then reads only half full. What can I do to fix this.
Because you don't drive it or it's broken.
wright behind the full tank above the rear
If all the connections and wiring look good, it is probably the fuel gauge sending unit in the fuel tank.
It's likely the float sensor in the gas tank is malfunctioning. It might be part of the fuel pump assembly.
It is a returnless system. When the fuel leaves the tank it is already at full pressure. The regulator is inside the fuel sending unit (inside the fuel tank, located under the back seat)
I had this problem with my 2002 montana. The fuel gauge inside the tank was defective I went to a garage where and had the gauge changed (you can buy the part from the dealer ) You have to take the fuel tank down and unplug the wires and the fuel lines(you need a special tool to disconnect the fuel lines) Parts and labor cost me $260.00
Your fuel pump is inside your fuel tank. To replace it you have to remove the fuel tank and remove the access plate on the top of the tank. Full directions are in Chilton's at your local library.
The gauge and low-fuel light use different senders. The sender for the low-fuel warning is either malfunctioning or there is a wiring fault.
On a 2002 Ford F-150 : The fuel pump relay is located in the Power Distribution Box ( which is " live " ) located in the engine compartment ( on the drivers side of the engine compartment ) The fuel pump relay is a full size relay , it is ( # 301 )
It depends on how much it moves. The fuel level will vary a little not much just from everyday driving. But if it is going from full to empty and back to full and so on a so forth. Then it is your fuel level sensor on your fuel pump. It primarily monitors the float that is in your fuel tank. It if is bad then the fuel level will vary significantly and with no pattern.
This is usually cause by a vacuum leak in the fuel tank evaporative system.