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Common Symptoms of a Failing Wheel Speed Sensor and How to Fix Them

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Hugh Davenport
Common Symptoms of a Failing Wheel Speed Sensor and How to Fix Them





Wheel Speed Sensor



Welcome to our blog post where we will dive into the common symptoms of a failing wheel speed sensor and provide you with helpful tips on how to fix them. If you've been experiencing issues with your vehicle's stability control system, anti-lock braking system, or traction control system, then a malfunctioning wheel speed sensor could be the culprit. It's important to understand the symptoms and potential solutions to ensure your safety on the road.



Wheel Speed Sensor Replacement



Before we delve into the symptoms of a failing wheel speed sensor, let's briefly discuss the importance of timely replacement. If you determine that your wheel speed sensor needs to be replaced, we strongly recommend seeking professional assistance. While it may be tempting to attempt a DIY solution, it's crucial to ensure the accuracy and reliability of the replacement process. A qualified technician will have the necessary tools and expertise to complete the replacement properly.



Here are the steps typically involved in wheel speed sensor replacement:



  1. Jack up the vehicle and secure it with jack stands.
  2. Identify the wheel speed sensor location on each wheel.
  3. Disconnect the electrical connector attached to the sensor.
  4. Remove the bolt/screw holding the sensor in place.
  5. Carefully detach the sensor from the wheel assembly.
  6. Clean the mounting surface and ensure it's free of any debris or corrosion.
  7. Install the new sensor and tighten the bolt/screw.
  8. Reconnect the electrical connector.
  9. Lower the vehicle and test the new wheel speed sensor.




Remember, if you're not confident in performing these steps yourself, it's always best to consult a professional.



Symptoms of a Failing Wheel Speed Sensor



Now that you understand the basics of wheel speed sensor replacement, let's explore the symptoms associated with a failing sensor. Recognizing these signs early on can save you from potential safety hazards and costly repairs.



1. ABS or Traction Control Warning Light


The most common indicator of a failing wheel speed sensor is the illumination of the ABS (Anti-lock Braking System) or traction control warning light on your vehicle's dashboard. When the sensor detects an abnormal reading or malfunction, it triggers the warning light to alert you to a potential issue. If you notice the warning light, it's important to have your vehicle inspected as soon as possible to diagnose the specific problem.



2. Inconsistent or Loss of Traction Control


A failing wheel speed sensor can also result in the loss of traction control functionality. You may notice decreased stability and control while driving, especially in slippery conditions. If your vehicle's traction control system seems to be less effective or completely inactive, it could be due to a malfunctioning wheel speed sensor.



3. Unstable Braking


The wheel speed sensor plays a vital role in determining the braking force distribution between the wheels. When it fails, you may experience uneven braking or a jittery sensation while applying the brakes. This inconsistency can compromise your ability to control the vehicle and warrant immediate attention.



4. Speedometer Inaccuracy


Another symptom of a failing wheel speed sensor is a speedometer that provides inaccurate readings. If you notice significant discrepancies between your vehicle's speedometer and the actual speed, it could indicate a malfunctioning sensor. It's important to have this issue fixed promptly, as it can affect your compliance with speed limits and lead to other potential problems.



5. ABS Activation During Normal Driving


A malfunctioning wheel speed sensor can trigger the ABS system to activate unnecessarily. This means that you may feel the pulsating sensation typically associated with ABS activation even during normal driving conditions. If you experience this symptom, it's crucial to address the underlying issue, as it can affect your vehicle's overall braking performance and safety.



Wheel Speed Sensor Malfunction



When faced with a failing wheel speed sensor, it's important to take prompt action to prevent further complications. Here are some steps you can take to address the issue:



1. Diagnostic Scan


If you notice any of the symptoms mentioned above, the first step is to have your vehicle scanned for trouble codes. A diagnostic scan can pinpoint the specific wheel speed sensor causing the issue. This information will facilitate the appropriate repair or replacement.



2. Cleaning and Inspection


In some cases, the wheel speed sensor may become contaminated by dirt, debris, or corrosion. Cleaning the sensor and its mounting area can potentially resolve the problem. However, it's crucial to handle this process with care, as excessive force or incorrect cleaning agents can damage the sensor.



3. Sensor Replacement


If cleaning and inspection do not resolve the issue, sensor replacement may be necessary. As mentioned earlier, it's strongly recommended to consult a professional technician to ensure the accurate installation of the new wheel speed sensor. They will also be able to conduct additional diagnostics to confirm the precise cause of the malfunction.



4. System Calibration


Once a new wheel speed sensor has been installed, it's important to calibrate the system to ensure optimal functionality. Calibration typically involves using specialized tools and software to sync the sensor readings with the vehicle's stability control system or ABS. This step is crucial to ensure accurate data transmission and maintain the overall safety of the vehicle.



Remember, addressing a failing wheel speed sensor promptly can help prevent accidents, maintain braking performance, and ensure optimal vehicle stability. If you're unsure about any aspect of diagnosing or fixing the issue, it's always best to consult a professional technician who can provide expert guidance.



We hope this blog post has provided you with valuable insights into the common symptoms of a failing wheel speed sensor and the necessary steps to address them. Stay safe on the road!


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Hugh Davenport
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