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How to fix failure of anti-lock braking system?

If your vehicle's anti-lock braking system (ABS) fails, it can be a serious issue that requires prompt attention. The ABS is a crucial safety feature that helps prevent the wheels from locking up during emergency braking, allowing the driver to maintain control of the vehicle. In this article, we'll provide a step-by-step guide on how to diagnose and fix a failed ABS.


Diagnosing ABS Failure


The first step in fixing a failed ABS is to diagnose the problem. Here are some common signs of ABS failure:



  • The ABS warning light is illuminated on the dashboard.

  • The brakes feel "spongy" or unresponsive during hard braking.

  • The vehicle pulls to one side during braking.

  • The wheels lock up during emergency braking.


If you notice any of these symptoms, it's important to have your vehicle inspected by a qualified mechanic as soon as possible.


Potential Causes of ABS Failure


There are several potential causes of ABS failure, including:



  • Faulty ABS sensors: The ABS system relies on sensors to monitor the speed of each wheel. If one or more of these sensors fail, the ABS will not function properly.

  • Wiring issues: Damaged or corroded wiring in the ABS system can cause electrical problems and prevent the system from working correctly.

  • Brake fluid leaks: Leaks in the brake lines or ABS hydraulic unit can cause a loss of brake fluid, which can lead to ABS failure.

  • Mechanical problems: Issues with the brake calipers, rotors, or other mechanical components can also affect the ABS system.


A qualified mechanic will be able to diagnose the specific cause of the ABS failure and recommend the appropriate repair.


Repairing ABS Failure


Once the cause of the ABS failure has been identified, the repair process can begin. Depending on the issue, the repair may involve:



  • Replacing faulty ABS sensors

  • Repairing or replacing damaged wiring

  • Replacing the ABS hydraulic unit

  • Addressing mechanical issues with the brakes


In some cases, the ABS system may need to be reset or recalibrated after the repair is complete. This is to ensure that the system is functioning correctly and providing the necessary safety features.


It's important to have any ABS-related issues addressed promptly to ensure the safety of you and your passengers. If you suspect your vehicle's ABS is not functioning properly, don't hesitate to have it inspected and repaired by a qualified mechanic.

Can an ABS system be repaired?


Yes, ABS brakes can be repaired. The repair may involve replacing faulty sensors, the ABS control module, or other components.



Can you drive a car with faulty ABS?


You can continue to drive your vehicle with an illuminated ABS light because you'll still be able to brake. However, this isn't advisable because your vehicle's ABS is likely turned off and you and your passengers won't benefit from its safety.



What should you do if your ABS system fails?


If you have a malfunction in the ABS, physically check all wiring and the brake sensors first. When checking the brake sensors, look for metal shavings and other debris that could cause false feedback to the electronic ABS controller.



Can you drive with failed ABS?


You can continue to drive your vehicle with an illuminated ABS light because you'll still be able to brake, but this isn't advisable.



How much does it cost to replace the ABS sensor?


$200-$400. The average cost to replace your ABS Speed Sensor is $200 - $400. Pricing may vary based on the type of car you have, as well as the type of (and quality) auto shop that you go to.



How do I get my car out of anti-lock mode?


To get a car out of anti-theft mode with a key, insert the key into the ignition, turn it to the "on" position, and wait for the anti-theft system to deactivate, which may take a few minutes.



How much does it cost to fix an ABS brake system?


ABS wheel sensors cost anywhere from $100 to $200 each, while ABS control modules run from $200 up to $600 apiece. Adding labor, a “typical” ABS repair could easily run upwards of $1000 to replace a few sensors and test the new system.



How to solve ABS problem?


Check your car's manual to locate the ABS fuse box and inspect the fuse for damage. Replacing a faulty fuse might resolve the issue. Next, examine the brake fluid reservoir. Low fluid levels can trigger the ABS light, so topping it up with the correct type of fluid may fix the problem.



How do I reset my anti-lock brake system?


If the light really is the ABS light, the first thing to try is turning the ignition key off and back on. It's like rebooting your computer.



Can I replace the ABS sensor myself?


The good news is, replacing an ABS sensor is usually a straightforward task. In most cases, all you need to complete the job is a jack, jack stands, and basic hand tools.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.