If you are referring to the little arrow under the gas symbol, the arrow points to the side of the car that the gas cap is on. Very useful if you drive a lot of different cars!
The arrow is there to show the level of petrol or diesel that is in the vehicle's fuel tank.
A common problem with Honda cars is that the fuel gauge is stuck on full. This problem is solved by replacing the gauge cluster.
The fuel gauge is located in cars. It is used to tell how much fuel is left in the tank. When this gets low the tank will need filling up with more fuel.
Most cars have a schrader valve on the fuel rail that you attach a fuel pressure gauge to. Cars that don't require you to tee into the fuel line at one of the soft connections.
In most cars it is as simple as looking at your gas indicator on the dashboard. Usually on the fuel gauge is a small picture of a gas pump. On one side or the other of the picture there will be a small triangle arrow that points to the side that the gas cap is located on.
Nascar cars do not use normal gas gauges due to the fact that when the cars are in corners the centrifical force causes the fuel to slosh around in the fuel cell, Which in turn would cause the gauge to sometimes show that it is empty and sometimes full. That is why they use fuel pressure gauge instead. Which tells the driver how they are doing on fuel via the needle bouncing back and forth.
A gauge for measuring fuel in a tank.
WHEN THE LOW FUEL LIGHT LIGHTS UP YOU HAVE VERY LOW FUEL. tHE NEEDLE WONT EFFECT ANYTHING IT JUST HELPS YOU KNOW WHERE YOUR LEVEL IS.
Air fuel ratio gauges rely on a sensor that is very much like an O2 sensor used in a car's emmission system. Therefore you would have to have 'bung' drilled and welded into your cars exhaust system to mount the sensor for the air/fuel gauge. After that, run the wiring and mount the gauge like any other aftermarket gauge.
Reset a fuel gauge? There is not reset for a fuel gauge.
The fuel gauge will no longer give an accurate reading.
Generally it involves the float or sending unit. If vehicle had a fuel pump installed recently talk to the people who did it and inform them of this!