Skip the auto shop - Our mechanics make house calls

Q: Speedometer 5 MPH too slow

asked by on

The van is going five miles under the speed it is showing on the speedometer.

Speedometer issues are not very common and sometimes can be caused by things we do. For example replacing the tires. Tires need to be replaced with tires of the exact same size because that is the size that is programmed into the vehicles computer. So the speedometer calculation is done based on that. If you have replaced your tires with a different size, the vehicle can be reprogrammed to the new tire size so that it all works correctly. This is something that the dealership will need to do for you as it is a factory setting. If you have not replaced your tires, but are still having issues, it might be caused by the speed sensor in the transmission. Some vehicles have two speed sensors. A qualified mechanic can determine the speedometer issue and replace the necessary parts to get it functioning properly again.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: 2007 Honda Odyssey, 102K miles. Started hearing some engine noise when turning steering wheel at low speed couple of weeks ago. En

The noise associated with steering at low speed is not related to the fault causing code P1717 to display. The steering related noise could involve the power steering pump and/or drive belt although there are other possibilities. To pinpoint the...

Q: Speedometer isn't working

Hi. If your speedometer is not working, and your Check Engine Light this may be a sign that your speedometer sensor has failed. As the speedometer sensor is located in the transmission, underneath the vehicle, I would recommend having the...

Q: Trunk door won't stay open

The trunk, also known as the rear hatch on your Honda Odyssey, is a pretty heavy piece that requires two parts known as struts to hold open. What you are experiencing is likely one or both of the rear hatch...

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.