Skip the auto shop - Our mechanics make house calls

How Long Does a Transmission Speed Sensor Last?

transmission speed sensor

The transmission speed sensor measures the RPMs of the shaft of the transmission. While the engine is running, but not moving, then the input shaft of the transmission is not moving either. When the input shaft moves, the transmission speed sensor reads this motion and delivers this information to the control module. Furthermore, while the input shaft is moving, the vehicle is moving, so the input shaft is rotating at the same RPMs as the engine. The speed of the vehicle depends on the input momentum and the present gear ratio, while the speed of the input shaft is related to the speed of the vehicle.

Over time, the transmission speed sensor can go bad due to wiring issues or just outright failing due to it constantly being used every time you are driving your vehicle. If the sensor is magnetic, it can go bad from iron sticking to the tip of the sensor, which will cause an inaccurate reading. In this case, the sensor may not have to be replaced as the sensor can be cleaned off. Yet, only a mechanic should make that determination because there may be damage to the electrical part of the sensor.

Normally, the transmission speed sensor is diagnosed with a scan tool which is read by a mechanic. If you suspect your transmission speed sensor needs to be replaced because your vehicle seems run at high or low RPMs, contact a professional mechanic so they can inspect your vehicle and read any error codes that come up. Reading the error codes is the most definitive way to determine if your transmission sensor speed is to blame.

Since the transmission speed sensor can go bad and fail over time, it is important to recognize the symptoms before it completely fails so you can have it replaced.

Signs your transmission sensor needs to be replaced include:

  • Erratic RPM readings

  • The needle not moving at all on your RPM gauge

  • Hesitation when you shift gears, either manual or automatic

The sensor is an important part of your transmission and your vehicle running smoothly, so this repair should not be put off. Have a certified mechanic replace the failing transmission speed sensor to eliminate any further problems with your vehicle.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

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...
P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222...
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...


Related questions

Q: Who do you know what to replace the AC compressor or the clutch when it is squeals

Hello. I'm sorry to hear of this. If you are turning on the A/C and you are hearing excessive or unusual noise at the compressor, the drive belt is squealing, the belt jumps, or there is unexpected mechanical resistance impeding...

Q: Car won't go forward

The transmission fluid levels would need to be checked, and the fluid should not smell burnt; if it smells burnt, then the forward clutches may be burned-out. Only a thorough transmission check and pressure test can determine whether the transmission...

Q: Speedo dial is 10mph lower than actual speed

This could be caused by a design flaw in the calibration reset of the cluster when you turn on the key. You can try to disconnect the battery for a couple minutes then reconnect it. The speedometer will reset itself...