Q: why doesnt my fuel gauge show me how much gas is in the tank?

asked by on

When I pump gas my fuel gauge doesn't show how much gas is in the tank. Why?

My car has 178000 miles.
My car has an automatic transmission.

There are 3 components, and wiring involved in a fuel gauge on your car. There is a fuel level sensor, also called a sending unit, the PCM (main engine computer) and the instrument panel.

The fuel level sensor is mounted in the fuel tank aside the fuel pump. It is the most likely part to cause your issue. Wires go from it to the PCM, and the PCM communicates the fuel level to the fuel gauge in the cluster. Any one of these parts, or wiring, can cause the gauge not to work. The problem will need to be diagnosed, and the repair made. If you would like a quote, consider YourMechanic. We come to you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. why doesnt my fuel gauge show me how much gas is in the tank?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Hold button flashing, no a/c,and temp gauge not functioning

Hello. This can be caused by a few different things. Most of the time it is caused by low refrigerant in the system, but I have seen a lot of these switches fail as well as the pressure switches in...

Q: 2002 Chevy cavalier. The RPMs are jumping when stopped then AC blows cold till I slow down or stop then it blows warm.

What you are describing sounds like a dirty or failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and...

Q: What repairs fix codes P0172 and P0304? I just had all the spark plugs replaced recently.

The P0304 code indicates a misfire has been detected on cylinder 4. The P0172 code indicates that the fuel mixture is richer than the mixture control can compensate for. It's possible that they are related, but not necessarily. Rich mixture...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...