Skip the auto shop - Our mechanics make house calls

Q: Limp mode

asked by on

Speedometer doesn't work, won't shift higher than 2nd gear. Changed speed sensor. Need a list of possible sensors or parts to start changing.

My car has 20000 miles.
My car has an automatic transmission.

A: Hi, thanks for writing in. There are severa...

Hi, thanks for writing in. There are several sensors, cables and other components that might contribute to a malfunctioning speedometer. The best solution to try and pinpoint the source of your speedometer issue is to complete a diagnostic scan to download error codes stored in the ECU. If you can’t do this, start by inspecting the speedometer cable and housing or contact one of our mechanics to complete the scan for you.

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: Why isn't my truck not starting?

You have an electrical issue at the fuel tank. It is possible a wire was pinched/broken on the fuel pump assembly. Also possible is the fuel pump harness was damaged or pinched when your fuel tank was removed and replaced....

Q: Gas cap light

Hi there. In some cases when a gas cap error light comes on, the issue will be with the filler neck, or gasket that is actually triggering the code to illuminate. In some instances the sensor itself is the source...

Q: 2002 blazer 4x4 zr2 abs brake light stays on.

You would need to have the system scanned to see what the feedback the ABS light is giving. From there, you would need to turn off the light after the system is reset to see if it comes back. You...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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...