Skip the auto shop - Our mechanics make house calls

Q: My speedometer does not work and my fuel guage is telling that I'm getting 2.3 mpg.

asked by on

With my problems with the speedometer and fuel guage, and I also had a performance tune on my gto.

A: Hi there: In most cases, the issues with t...

Hi there:

In most cases, the issues with the speedometer and fuel gauge are related; since they receive data and input from similar sources. It could be a problem with an electrical relay from the ECU to the speedometer, a transmission speed sensor issue or perhaps a problem with the gauge itself. However in some rare instances, performance upgrades like the one you indicated you had done on your GTO can cause electrical communication problems from the ECU. You should start by having a professional mechanic complete a check engine light inspection to determine if you've got some trouble codes that indicate where the problem exists.

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

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: Mirror won't swivel using inside switch

Hi. If your mirror is not longer functioning correctly, it may be possible that the mechanism connecting the mirror to the motor has become damaged. Many times, these are made of plastic, and can become brittle and easy to break....

Q: Wheel stud replacement

The easy way to do it is to replace the hub assembly if you have a lot of miles on them since it will give you new studs and bearings. If you want to just replace the studs, you can...

Q: Temperature starting to climb on a 2004 Pontiac GTO

Hi there, thanks for writing in about your 2004 Pontiac GTO. If the weather in the area has been very hot, you can expect a rise in the operating temperature of a vehicle. The cooling system works to remove as...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.