Skip the auto shop - Our mechanics make house calls

Q: Faulty gas gauge or sending unit?

asked by on

I was driving down one night and my engine suddenly stalled. I initially ruled out lack of gas since my gas gauge says I still have over half a tank remaining. However, just to be sure, I put in some gas using a jerry can and yes, the car did start. So the tank was empty. At this point (having added only 5L of gas, as per the jerry can's capacity), the fuel gauge still said over half tank (same position as before my engine stalled).

I filled the tank up to full. The gas gauge went up, but not exactly "full".

Would this be a faulty gas gauge in the instrument cluster, or a faulty sending unit?

Thanks

My car is a 2001 Honda Civic Si with 205,000 kilometers.
My car has a manual transmission.

A: This is a problem likely related to your fu...

This is a problem likely related to your fuel tank sending unit. This is a small float type component inside your fuel tank that measures the level of the fuel inside the tank. As the fuel level drops, the float level changes and sends a signal to the car's computer which then displays the reading on the fuel gauge in your dash. If you need assistance with this, I would recommend having an expert from YourMechanic come to your location to diagnose the issue and repair your fuel sending unit as necessary.

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・Save up to 30%

Get a quote

What others are asking

Q: Car stalling

Hi. Its very possible that partial blocking of the fuel system may be the cause of the fuel injectors not having an atomized spray pattern, which is the foundation of your vehicle's sputtering problem. The Fuel pressure and volume need...

Q: Flat battery

Hi There, It may be possible that you may have had a weak battery that may have been on the brink of dying depending on the age of the battery. The other possibility may have been that you have a...

Q: Having trouble trying to locate my knock sensor. It's throwing a code for it. 1,2,4,5,6 cylinder misfires

As you may know a knock sensor may fail for any of the following reasons: The knock sensor is faulty and needs to be replaced There is a wiring open/short/fault in the knock sensor circuit The PCM/ECM has failed...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...