Skip the auto shop - Our mechanics make house calls

Q: Gas gauge is not working correctly

asked by on

When I'm driving the gas notch shows me where I'm at with gas but when I start driving it goes down but I just put gas in it. What's going on?

A: If the gauge pointer on the fuel gauge is r...

If the gauge pointer on the fuel gauge is registering incorrectly, or fluctuating excessively (it can move a little depending on vehicle angle and motion), there could be a problem with the sending unit in the gas tank, the dash gauge itself and/or the interconnecting wiring. All of these components can be tested by a certified professional from YourMechanic during a mobile visit. It is not unusual for the sending unit in the tank to fail and those units are replaceable. But, first the issue has to be accurately diagnosed and you can rely on YourMechanic to do this by inspecting and servicing your car at your home or office.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Fuel tank gauge registered inaccurately & repair did not work

Hi. Thanks for writing in about your 2003 Infiniti M45. Fuel level indicators may go bad if they become dry. Fuel level indicators are meant to stay wet. If the fuel level reaches a certain low, the fuel level indicator will...

Q: Won't start right away. Chugs while excellerating .

Your 1995 Buick LeSabre has two different problems: The hard start problem is the fuel pressure not being maintained after shut down. This can be caused by the fuel pump in the tank or the pressure regulator on the...

Q: Trying to pass emissions test. Failed once. Code P0449

Hello, thank you for writing in. Code P0449 will set when the system sees that the position of the vent valve, and the voltage for its position, do not match. There could be a wiring problem, a faulty hose, or...

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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control 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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...