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Vehicle Speed Sensor Replacement
What is a Vehicle Speed Sensor?
In order for systems like anti lock brakes, traction control, and the speedometer to function properly, the ABS control module and Powertrain control module must know the speed the wheels should be spinning, as well as the speed the wheels are actually spinning. To create the data the computer needs for the speed the vehicle should be spinning, the transmission output shaft speed, for most vehicles, is measured by the vehicle speed sensor. The vehicle speed sensor will detect the speed of the output shaft many times per second, and send that data to the necessary control units for further use.
How does a Vehicle Speed Sensor work?
As the output shaft for the transmission turns, a ring on the output shaft spins very closely to the vehicle speed sensor, allowing the sensor to read how fast the ring is spinning by features on the ring. The speed of the output shaft, then, is reported back to various control modules by a digital or analog signal, whichever the control unit is designed to interpret. This is used to show the vehicle speed on the speedometer, but also has applications for the anti-lock brake system and traction control system since the information can be compared to wheel and engine speed.
The average cost for a 2010 Hyundai Veracruz Vehicle Speed Sensor Replacement is between $1,390 and $1,618.
Labor costs are estimated between $488 and $716 while parts are typically priced around $902.
This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.
For a more accurate estimate based on your location, use our Fair Price Estimator below.
A failing Speed Sensor can also cause drivability issues including loss of power, increased fuel consumption, and hesitation.
An inoperative speedometer, or non-working cruise control may signal a failing speed sensor.
What are the symptoms of a bad Vehicle Speed Sensor?
When the vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.
Can I drive with a bad Vehicle Speed Sensor?
Testing and replacement of the speed sensor should be done as soon as possible, but in the case that the speedometer is the only thing affected, normally older vehicles, the vehicle can be driven until the sensor is tested and replaced. It should be mentioned that driving without a speedometer is illegal in most locations, and if the anti lock brakes and traction control are disabled, the vehicle will be more prone to sliding under heavy braking or acceleration.
How often do Vehicle Speed Sensors need replacement?
The vehicles that will experience the highest rate of failure for the vehicle speed sensor are those that are left unmaintained. As transmission fluid ages and becomes contaminated, those contaminates will become stuck to the speed sensor or ring, and prevent accurate readings. If the powertrain control module cannot read the vehicle speed, even though the sensor is working properly, the result will be the same as if the sensor had failed. Generally, a vehicle speed sensor should last well over 100,000 miles, and the average replacement frequency is closer to 150,000 miles, with exceptions. To prolong the life of your vehicle speed sensor, as well as all other components in your transmission, ensure you are maintaining the transmission in accordance with the owners manual service and maintenance section.
How are Vehicle Speed Sensor issues diagnosed?
Diagnosing a failed speed sensor will begin with reading diagnostic trouble codes, checking the fuses for the circuit, and testing the circuit for presence and accuracy of battery voltage, signal voltage, and ground. If the circuit tests ok, there are a few safe ways to test the speed sensor, all of them involving a computerized diagnostic scan tool. It is not recommended to test the speed sensor. If the speed sensor is found to read incorrectly, a transmission flush may be recommended, but if the speed sensor is not functioning at all, it will need to be replaced.
How are Vehicle Speed Sensors replaced?
Replacing a vehicle speed sensor is straight-forward, simple to do, and typically requires removing one or two fasteners, and one electrical connection. Once those are disconnected, the speed sensor should easily slide out of the exterior of the transmission housing. The electrical connector for the vehicle speed sensor harness is then cleaned, inspected, and attached to the new sensor once fastened in place.
When replacing a speed sensor, its related wiring should always be thoroughly inspected.
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