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      Your concern might be complex to diagnose and may require additional equipment to pinpoint the cause. In this case, you'll receive Digital Inspection results plus a quote to perform deeper diagnostic/test procedures.

      Hey, Why Are My Car's ABS And Traction Control Lights On

      If you are short on time and want to fast-track the process to professional help, click
      Four common causes for an “ABS/TCS” warning light on the vehicle and their related parts.
      The ABS (anti-lock braking system) and Traction Control Lights are an important reminder to the operator that there is a fault in the automated braking and traction control system of the vehicle and that some components of the system may be disabled and if you are driving on slick surfaces or need to make a panic stop the automated systems will not assist the driver and the vehicle may be unsafe to operate under these conditions.

      Are your ABS and Traction control lights on?

      The ABS and traction control lights are likely on due to driving on slippery terrain, indicating a "mode" the car activated. However, damaged brake and steering system sensors could send incorrect signals, causing the light to stay on continuously. Another possibility is problems with traction or brakes, such as low brake fluid.

      Don't ignore those flashing ABS and traction control warning lights on your car's dashboard. They indicate that something is wrong with your vehicle's braking system, requiring immediate attention. The sooner you take action, the better, as the damage could become more severe, leading to costly repairs.

      Keep an eye out for any unusual behavior in your car. Read our informative articles to gain the knowledge you need to communicate productively with your mechanic. Together, you can advocate for your vehicle to run at its best.

      Let's Get To The Bottom Of It!

      Are your dashboard ABS and Traction control light warnings active?

      These warnings indicate a fault in the anti-lock braking and traction control systems. As a safety measure, when this type of failure occurs, the vehicle disables these driver assistance systems, somewhat limiting advanced skid, traction control, and braking capacity.

      If you notice traction loss on slippery roads, odd braking performance, and warning lights on the dashboard, you might wanna share these symptoms with the auto shop. These are critical indicators that they need to know.

      Are your brakes locking when you stop on slippery roads?

      A sensor in the brake pedal captures motion, informing the computer whenever the driver presses the brakes. This sensor also reads movement intensity, differentiating sudden emergency stops from regular ones. Additionally, this system comprises a backup sensor that compares readings with the original one, ensuring that they agree.

      So, if a sensor fails, the backup takes over, preventing the brakes from dying. However, if both fail, your brakes might lock up. Plus, if the backup sensor doesn't agree with the original, a slight braking pressure might incorrectly be read as an emergency stop, locking up the brakes.

      If you notice brake locking, red brake warnings, less-sensitive brake pedals, and check engine light on the dashboard, share these symptoms with the auto shop. These are critical indicators that they need to know.

      Do your tires spin when accelerating on slippery or icy roads?

      The steering angle sensor is a car part that reads the driver's motion on the steering wheel and shares it with the computer. It reads direction and speed, showing where and how fast the driver wants to turn.

      The computer uses this information to ensure all the wheels move at the right speed, and the traction control detects any slower wheel and makes it move faster; this "harmonizes" the wheels' rotating speed.

      However, any failure in this sensor might cause the traction control system to operate poorly, resulting in handling problems. So if you notice inoperative cruise control, steering rack failure, steering wheel buttons failure, and airbag light on the dashboard, share these symptoms with the auto shop.

      Has anyone pointed out that your ABS and Traction control are disabled?

      The ABS module is the car's computer that controls the anti-lock braking system. It gets power when the driver turns on the ignition; it also gets info from sensors around the vehicle to know if a wheel is about to lock up or lose traction.

      If this module detects a wheel close to locking or losing traction, it activates the anti-lock brakes. Note that this process happens much faster than you could react. It's like a light-fast driver assistant, helping the car maintain control of urgent brakes.

      If you notice brakes locking up, an inoperative speedometer, steering wheel buttons failure, and an airbag light on the dashboard share these symptoms with the auto shop.

      Is your speedometer working correctly?

      The ABS module gets information from many car sensors to determine the driving speed. Then, it sends this information to the car's network, including the speedometer.

      However, if the module isn't working correctly, it'll provide wrong inputs about the vehicle's speed. So, keep an eye out if your speedometer is incorrect or inoperative.

      If you notice an inoperative speedometer, ABS, Traction control, less-sensitive brake pedals, and a check engine light on the dashboard, share these symptoms with the auto shop.

      Have you checked your vehicle's fuse box?

      The ABS pump, which is part of the anti-lock brake system in your car, pushes the brake fluid to make the brakes work. It applies or pulses the brakes to each wheel very quickly.

      However, if a motor problem happens, such as a short, a fuse blows up by default to protect the wiring and remaining electrical systems in the car. This process is a safety measure to prevent further damage.

      If you notice an inoperative speedometer, ABS, Traction control, less-sensitive brake pedals, and a check engine light on the dashboard, share these symptoms with the auto shop.

      Find Professional Help

      Please select your vehicle's brand and location so we can locate the best professional help for you
      If you are a shop owner and sick of business directories that are based on the cost of repair, AutoTechIQ is for you. If your customers receive Digital Inspection results then AutoTechIQ is definitely for you. Check out the certification page or how to rank in your area.

      Vehicle Health Inspection Proof

      Explore the following typical inspection results that show a potential cause for the symptom and select the one you believe is similar to your vehicle's issue.

      • Brake pedal sensor failure
      • Steering sensor failure
      • Abs module failure
      • Speedometer-related abs failure
      • Abs pump failure
      • Faulty traction control system
      Brake pedal sensor failure

      This image shows the results of a brake pedal scan reading. In this case, the pedal isn't sending proper signals.

      A customer dropped this vehicle off at the shop complaining about its brakes. They said that the brakes were locking up when they were driving on wet roads and that sometimes the brake pedal felt less sensitive.

      The mechanic performed a test drive and noticed that the brake pedal wasn't communicating smoothly with the brakes. In addition, the car's dashboard didn't indicate any ABS and traction control light on.

      The shop performed a vehicle health inspection, which didn't lead to any relevant diagnostic. So, the customer allowed for additional, more in-depth, testing procedures.

      The additional tests found failure codes such as the C0045, C0046, and C0044, which all relate to the brake pedal sensor. Then, the technician used a special scanner to measure the pedal sweep, which seemed fine.

      However, when testing the pedal sensor's circuits with a lab scope tool, the technician found glitches at different pedal sweep levels. So, they'll need to replace the brake pedal assembly.

      Does the issue look like this? if not accessible your shop will document it

      Typical Fixes to Address the Cause(s)

      The following chapters bases themselves on experiences from our auto repair shop; we'll describe related problems' causes and fixes.

      • "ABS and TCS replacement" fixes "Faulty traction control systems"

        • Wiring harness replacement

        • Sensor pigtail replacement

        • Wheel speed sensor replacement

          Axle Bearing Replacement
          Wiring harness replacement
          Sensor pigtail replacement
          wheel hub and bearing assembly replacement
          Constant velocity axle replacement
          Brake pedal sensor replacement
          Traction control module replacement
          Blown fuses replacement
          Steering angle sensor replacement
          Miscalibrated sensor replacement
          Brake pedal assembly replacement
          Computer Software update
          Steering column replacement
          Clock spring replacement
          Wiring harness repair or replacement
          Anti-lock brake module replacement
          Anti-lock brake motor replacement
          Brake system flush

        • ABS Control Module replacement

        • ABS motor replacement

        • ABS control valve replacement

        • Brake pedal sensor replacement

          Wiring harness replacement
          Sensor pigtail replacement
          Brake pedal assembly replacement
          Brake pedal position sensor replacement
          Computer Software update

        • Traction control module replacement

        • Blown fuses replacement

        • Low tire pressure replacement

        • Steering angle sensor replacement

          Tire replacement
          Sensor pigtail replacement
          Wheel speed sensor replacement
          Computer Software update
          Air conditioning module replacement
          Wiring harness repair or replacement
          Computer module replacement
          ESC switch replacement

        • Miscalibrated sensor replacement

        The AutoTechIQ ranking for Safety, Cost Avoidance, and Environmental Impact is

        Safety
        AutoTechIQ AutoTechIQ
        Cost Avoidance
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        Environmental Impact
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      • "Brake pedal sensor replacement" fixes "Brake pedal sensor failure"

      • "Steering sensor replacement" fixes "Steering sensor failure"

      • "Air conditioning module replacement" fixes "ABS module failure"

      • "Wheel speed sensor replacement" fixes "Speedometer-related ABS failure"

      • "ABS pump replacement" fixes "ABS pump failure"

      Sometimes a problem is more challenging to describe than it initially looked like. If you are not sure your problem is described by this article, please find below similar vehicle symptoms, which might describe better the issue you are experiencing.

      Vehicle Symptoms

      Below are just a few examples of typical Symptoms and Fixes your car might be experiencing

      Typical Fixes Pages