Q: Fuel gauge still reading as full after driving

asked by on February 14, 2017

I filled up my 2005 Hyundai Elantra the other day and have driven about 60 miles (100 KM). The fuel gauge is still reading at full though. I'm just wondering if there are any easy fixes that you can think it might be.

Thanks for your help!

My car has 150000 miles.
My car has a manual transmission.

Hello. There are not many things which can cause an erratic fuel gauge reading. They’re usually one of two things, the fuel gauge display itself as being faulty or a bad fuel gauge sending unit. I suggest that you drive the vehicle for about 20 more miles and if that doesn’t change the gauge position then you’ll likely have an issue with the fuel gauge in your instrument cluster or with the fuel level sending unit on your fuel pump. One of our technicians here at YourMechanic will be happy to help you diagnose your vehicle in person if the issue does not subside naturally.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

What others are asking

cost of maniverter

Depending on the engine you have this price would be pretty close if both of them are being replaced. If this is for only one then it is high. You can get each manivertor online for less than $500 each...

The RPM stays high for a while after the car stops

There is a technical bulletin to reprogram the engine control module for the high idle for more than 10 seconds when the engine is cold. The reprograming should be done by the dealer and should fix the problem. The bulletin...

Engine surges at idle two or three times and shuts off

This may be a sign of an imbalanced air/fuel mixture caused by a failing idle air control valve. This is a unit that monitors air intake as it is mixed with fuel prior to being injected into the engine. When...

When I press the gas the car does not accelerate but instead makes a high rev noise.

Hello. If the car is in "Drive" and you attempt to accelerate from a standing start and yet the car does not move forward, you have a problem with the transmission (perhaps the linkages) and/or torque converter. The misfire code...

Car idling high in park

At such a high idle speed, a large vacuum leak would be possible if the engine didn't return to a normal level after warming up. The idle air control valve regulates engine speed when the throttle plate is closed, allowing...

Car makes a medium pitched whine or growl in sync with rpms.

If you are hearing the noise at idle when the car is not moving, generally the noise you are describing originates in the engine, the transmission (torque converter runs even at idle), and/or the accessory drives. However, if there is...

Transmission jumping when shifting

With the engine fully warmed up and running in Park, open the hood and look for the transmission dipstick. Pull it out and give it a wipe. Dip it back into the tube and pull it out, this time noting...

Transmission hot idle engine what is the problem

Transmission fluid and condition can cause the transmission temperature to rise. The transmission relies on the fluid not only for hydraulic pressure to move the vehicle and change gears, but relies on it for cooling as well. Low fluid level...

Engine stops and jerks while driving

Hi There, Your car has a small purge valve called a purge solenoid in the Evaporative Emissions system that controls the venting of fumes from the fuel tank as these fumes build up inside, particularly when you are refueling the...

Related articles

Symptoms of a Bad or Failing Fuel Filler Neck
Common signs include a fuel smell coming from the car, the Check Engine Light coming on, and fuel leaks.
How to Transport a Fuel Container
Everyone Everyone has seen a fuel can, and most people have had the opportunity to use one. Every fuel-powered vehicle needs to be re-fueled at some point, and it can be difficult or impossible to bring every implement to the...
How Long Does a Fuel Rail Sensor Last?
The The amount of pressure that is in a car’s fuel system is important and something that is heavily monitored. Without the proper amount of fuel pressure, the gas will not be able to properly circulate. This lack of circulation...