Q: Fuel gauge not reading correctly

asked by on February 09, 2016

My fuel gauge moves erratically and sometimes does not show how much gas is left. It was diagnosed with a code P0463.

Code P0463 is a code for fuel level Circuit A having an issue. The most likely candidate is a faulty fuel level sensor in the gas tank. The sensor has a float on the end of an arm that connects to a potentiometer that changes electrical resistance as the arm sweeps across the potentiometer. A worn spot in the potentiometer will cause a loss in being able to read the fuel level. Because of the nature of this type of repair which will need to open the fuel tank and replace the sensor I would recommend you enlist the help of a mechanic, such as one from YourMechanic, who has the training and experience to safely make this repair as opening the fuel tank can cause hazardous fuel vapor to escape and possibly ignite.

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

Need to put 1996 engine in it 2004 Chrysler Town & Country

Hi there - while the basic engines have stayed relatively similar (3.3l or 3.8l), and the basic transmission is the same (41TE), engine and transmission management has changed considerably. Staying with the same engine (EGA/EGH) may work as long as...

We are replacing rhe water pump and the special tool is not working it just keeps slipping the water pump is very rusty need help

The replacement of the water pump on your vehicle is more complex than the average vehicle and does require a special GM tool (J 38816-A Water Pump Remover & Installer), therefore if you desire you can request that a certified...

How long does it take to change out an oil pan gasket on a 2004 chevy blazer? Why is it so expensive when the gasket is vheap part

Hello. The procedure for this vehicle could be considered labor intensive in comparison to other vehicles. Replacing an oil pan gasket for your vehicle requires that the transmission be separated from the engine in order to remove and install a...

Bypass a.c. compressor with a short serpentine belt, can this be done if not what about a bypass pulley?

The compressor cannot be bypassed without the use of a compressor bypass pulley. It would cost more for a bypass for the compressor than it would be to just replace the compressor pulley. Install a new pulley or pulley bearing...

When i put the truck in 4x4 it makes a creaking noise and when i start to make a turn the truck wont turn all the way

Hey there. It is possible that it may be time to change the differential fluid, as this symptom is common when the differential fluid is dirty or low. This service is typically due every 100,000 miles. It is also possible...

Have to jumpstart my car every day

The vehicle may be having a problem with the A/C relay staying engaged after you shut off the vehicle. Try and make sure the A/C is off and the compressor is not engaged after you shut off your vehicle to...

Can the secondary air injection relay cause my transmission to randomly not perform as it should?

Since the majority of today's (if not all of them) are now controlled by electronic transmission control modules that receive inputs from the ECM, any glitch in the functioning of the motor may potentially cause a domino effect resulting in...

I got a message stating "Starting disabled theft problem" and the car will not start.

Hi there, thanks for writing in about your 2011 BMW 335 xDrive. It could be a low voltage situation with the battery. It can also be the key itself or the ignition switch. If you have access to a volt...

Engine, VSC TRAC and TRAC OFF lights are on at the same time

This is not a common problem and you should not drive the vehicle until this is properly checked out. This can be due to a bad connection in the ignition switch. Other possibilities include a serious problem with the engine...

Related articles

3 Essential Things to Know About Your Car’s Temperature Gauge
A car temperature gauge shows how hot the engine is. If the temperature gauge reads high, your car could be leaking coolant or have a bad water pump.
What Is E85 Ethanol?
E85 E85 ethanol is a fuel that can be used to power internal-combustion engines. Some vehicles can use E85 and gasoline, while others are tuned for E85 only. E85 is named as such because it is 85% alcohol. The other...
Why Can’t I Top Off My Tank?
Nearly Nearly everyone who has been behind the wheel of a vehicle has pumped gas into the fuel tank until the tank was full. When the tank is full, the nozzle makes a ‘clunk’ sound and the gas stops flowing....