Symptoms of a Bad or Failing Speedometer Sensor

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Cost of Replacing a Bad or Failing Speedometer Sensor

Common signs include the speedometer not working, cruise control not engaging, Check Engine Light coming on, and loss of power. Our certified technicians can come to you and diagnose the problem. You will receive a $30 credit towards any follow-up repairs that result from the diagnostic. Following are example prices for Speedometer Sensor Replacement. Click on the button below to get an upfront quote for your car.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2004 GMC Envoy $109 $39.20 $70.00 25% $146.70
2008 Hyundai Entourage $133 $63.15 $70.00 21% $170.65
2012 Hyundai Sonata $180 $109.88 $70.00 17% $217.38
2008 Audi A4 Quattro $151 $46.05 $105.00 27% $207.30
2008 Audi A8 Quattro $455 $385.06 $70.00 7% $492.56
2006 Porsche Cayenne $226 $86.37 $140.00 24% $301.37
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How to Diagnose a Bad or Failing Speedometer Sensor?

speedometer sensor

The electronics in today's cars and trucks are extremely complex. However, one of the simplest devices we rely on to deliver us factual data is the speedometer. Essentially, the speedometer is powered by three independent components; the speedometer on the dashboard, the cable attached from the speedometer to the driveshaft and the speedometer sensors attached to the driveshaft to measure speed. Some speedometer issues are due to dirty or faulty sensors that relay false data through the cable and eventually show up on the dashboard.

Where is the speedometer sensor located?

The speedometer sensor is located in the transmission of your vehicle and is designed to register the driveshaft’s rotational speed. The sensor delivers this information through the speedometer cable and to the vehicle’s computer, which converts electrical pulses into a numerical speed. Eventually that number is displayed on the speedometer and tells you precisely how fast you are driving. If the speedometer sensor is not working properly, the speedometer will be inaccurate; potentially leading to speeding tickets or unsafe driving situations.

The symptoms noted below will give you an indication that a problem exists with your speedometer sensor:

1. Speedometer does not work

Whether you have a digital or manual speedometer, if it's not displaying accurate information, it doesn't really help you. One of the biggest signs your speedometer sensor is not working properly is the speedometer will display inaccurate readings or the needle or digital numbers will not move at all on the speedometer display. A malfunctioning speedometer sensor can also cause a speedometer to act erratically, fluctuating the reading from one speed to another; even though in reality you're not speeding up or slowing down.

If you feel you are driving faster or slower than what the speedometer reads, it is a good idea to have your vehicle inspected by Your Mechanic, as this might be a problem with the sensor that can be repaired or an indication that the speedometer sensor needs replacement. Being proactive about repairing your speedometer issue can improve safety, not only for you, but others on the road. It can also reduce the potential of getting two citations; one for speeding and another for a damaged speedometer.

2. Cruise control does not work

The speedometer sensor is also a critical component in the proper operation of a vehicle’s cruise control. When the sensor is not working correctly, it will not send a signal to the CPU, which impacts the vehicle’s ability to set the throttle for a desired speed. As a safety measure, automotive manufacturers engineer the cruise control in a way that if the speedometer sensor is acting up, it won't engage the cruise control at all. On most cars sold today, this will be indicated by the cruise control light being illuminated on the dashboard - even if it's not engaged. If you experience this problem, it's possible that the speedometer sensor needs to be replaced.

3. Check Engine Light comes on

The speedometer sensor is located inside the transmission and attached to a driveshaft, which impacts multiple functions of the car. Due to this fact, it's possible that the Check Engine Light will light up on the dashboard if a sensor problem is discovered by the vehicle's CPU. Regardless of why the check engine light is illuminated, it's never a good thing, nor should it be avoided. If the check engine light shows up anytime, contact a mechanic as soon as possible so they can diagnose the problem with the correct diagnostic tools. Sometimes the issue is small and the CPU needs to be reset; but don't take that risk.

4. Vehicle loses power

Today's cars and trucks have electronic fuel injection, which is controlled by the onboard computer. The EFI supplies fuel to the engine based on input from multiple sensors; one of which is the speedometer sensor. If you notice that your car starts to lose power; especially when you apply pressure to the throttle, this might be caused by a damaged or malfunctioning speedometer sensor. This problem could be potentially harmful to other mechanical components on your vehicle, so don't ignore the issue. Contact a certified mechanic as soon as possible to determine what is causing this issue.

As you can see, the speedometer sensor impacts the operation of multiple components that allows you to efficiently operate your car or truck. Anytime you experience any of the above warning signs, contact a professional mechanic to properly diagnose and repair the issue.

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Speedometers

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Recent Speedometer Sensor Replacement reviews

Excellent Rating


YourMechanic Speedometer Sensor Replacement Service

Average Rating

4.6/5

Number of Reviews

51

Rating Summary
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3
42
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3

Scott

31 years of experience
206 reviews
Scott
31 years of experience
Veteran Technician - Does excellent work.
2003 CADILLAC DEVILLE - SPEEDOMETER SENSOR - DENVER, COLORADO

Rodney

33 years of experience
336 reviews
Rodney
33 years of experience
Arrived on time, quick and professional. Quality work.
2003 VOLKSWAGEN GOLF - SPEEDOMETER SENSOR - DAVIS, CALIFORNIA

TJ

23 years of experience
236 reviews
TJ
23 years of experience
I was a little sceptical of how this might work but there was no need for any concern. TJ kept me informed prior to the appointment and provided clear summary of the work and approach he was to carry out. Not only did he fix the fault, he also provided a inspection making recommendations of what work might need to be carried out. The cost was extremely reasonable as well, less than all other quotes I received from traditional garages backed up with a 12 month warranty. An appointment was arranged for the following day whereas other garages I had to wait at least a week. Plus there was the convenience of being at home. Excellent experience and will not hesitate to use YM again. Ideal for the busy family. TJ is passionate about what he does and provides an excellent customer service. Thanks!
1999 AUDI A4 QUATTRO - SPEEDOMETER SENSOR REPLACEMENT - AURORA, COLORADO

Scott

33 years of experience
469 reviews
Scott
33 years of experience
While he was nice and on time, he wasn't able to completely fix the issue as there was more than one thing broken it seems. He fixed the sensor for the speedometer so the car doesn't jerk through gears at random, but the speedometer still did not work (cluster issue). He did refer me to a place that specializes in that, so he did what he could; just can't give full credit for an incomplete job.
2004 CHEVROLET CLASSIC - SPEEDOMETER SENSOR - MESA, ARIZONA

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