Skip the auto shop - Our mechanics make house calls

Q: Incorrect speeds on the speedometer

asked by on

Hi, I have problems with the speedometer in my car. It doesn't show correct speeds whatsoever. Sometimes it just gets stuck and show very high speed although I drive moderately fast. Other times it shows 50 mph although I don't drive and it should be zero. What should I do to fix this?

A: I believe there are two possible causes to ...

I believe there are two possible causes to the issue you are having. One of the potential causes would be a faulty vehicle speed sensor. On many vehicles this sensor is located externally on the transmission or transaxle. If this sensor has failed, it could send false signals to the instrument cluster. The other possible cause of this issue would be a faulty instrument cluster. There are small gears inside most instrument clusters that control the needles on the gauge. If these plastic gears have been damaged due to becoming brittle over time, the speedometer may become inaccurate. For best results, have this issue diagnosed by a qualified professional to inspect why your speedometer is not working.

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: Broken timing cover

Depending on the severity of the crack in your timing cover, silicone may not seal it properly enough to keep it from leaking oil. Additionally, the silicone will fail over time causing it to leak eventually. I would suggest having...

Q: One morning it was cold and my car didn't start up. So when I got home from work at 4:00. I tried to start it IP it did. The next

In cold weather, engines need more fuel - a "richer" fuel mixture - to start. If the fuel mixture is too lean - not enough fuel - the vehicle may not start. Then later in the day when it may...

Q: What could be wrong with my car?

If your gears are not shifting properly, there is a fault in the transmission that would have to be diagnosed. It would be a good idea to start by checking your transmission fluid level. If the level is too low,...

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.