Skip the auto shop - Our mechanics make house calls

Q: Replaced a fuel module but the fuel gauge still reads empty when I know I have a full tank.

asked by on

Previous owner changed complete fuel maudule it has a faulty fuel needle on dash when I baught it , so I completely changed the fuel maudule, still fuel needle reads empty where as I know I have a half tank

My car has 189790 miles.
My car has an automatic transmission.

A: This may be related to the fuel sending uni...

This may be related to the fuel sending unit in the fuel tank. Your fuel tank has a float type unit that sits inside of it which monitors the fuel level in the tank and transmits this information to the ECU, which then allows this to be displayed in your fuel gauge in the dash. When the sending unit in the tank is not working properly, this will cause inaccurate readings to be displayed as you have noticed. If you need some assistance with getting this fixed, I would recommend having an expert from YourMechanic come to your home to diagnose and replace your fuel tank 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: Fuel gauge is erratic and inaccurate

Hello. Based on the symptoms you are reporting, your supposition is correct. The sending unit is typically a variable resistance element (i.e., a potentiometer) that can be tested by the Mechanic with an ohmmeter. These units can physically bind. The...

Q: Can a car jump start with a bad fuel pump?

Jump starting due to a bad battery will not make a bad fuel pump start working. I would recommend replacing a bad battery and then doing a thorough diagnosis of the fuel system to diagnose the fuel pump not working....

Q: Truck starting briefly and then dying

Hi. It seems like when you replaced the ignition, the key that came with the new ignition didn't come with a chip or it needs to be programmed. I suggest having a certified mechanic from YourMechanic inspect your vehicle's staring...

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...
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...