Skip the auto shop - Our mechanics make house calls

Q: My speedometer stopped working

asked by on

The transmission was overfilled causing the fluid to not cycle properly. The fluid then overheated on a trip, burned some, and the speedometer stopped working. The battery was old and needed to be replaced. To get the car started after the transmission fluid overheated I had to jump it. The power steering light came on shortly after. I took it to a dealership. They replaced the battery, drained and refilled the transmission, and replaced the vehicle speed sensor on the transmission. They claimed I needed to replace the power steering ECU also. When I took it to an independent mechanic he claimed I needed to replace the speed sensor again. I bought a speed sensor and replaced it myself as it is a relatively easy process, but the speedometer still doesn't work. When I replaced the speed sensor, I noticed the shaft that transmits rotation from the transmission to the sensor didn't have a head on it the way some of the pictures have shown it, it just had a roughened top. Help!

My car has 100000 miles.
My car has an automatic transmission.

A: Hello. The Toyota Yaris has an ABS system t...

Hello. The Toyota Yaris has an ABS system that has small sensors in each wheel. When the ABS system has any of these sensors that are not working, this will also cause the speedometer to not work as well. I would recommend checking each of the other wheel sensors as well. If you need help having this diagnosed, a certified professional from YourMechanic can come to your location to pinpoint the cause of your speedometer issue.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: alternator belt

Yes, the alternator will not work at all or perform its job without the belt. This is something that should not have been missed during your service and will very quickly lead to battery failure. As you may know the...

Q: My car is jerking while driving, and when sitting idle

You will want to have the fault codes in the transmission and engine computer read out. Based on previous transmission concerns, the operation of the CVT transmission is highly dependent on how well the engine is running. Misfires, valves out...

Q: Check Engine Light on; car stays at one speed

Hello. It sounds like you have a transmission problem. If the transmission is staying in one gear, I would have your transmissions inspected by a certified mechanic. Since the other control units are missing, information provided by the transmission control...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...