Your vehicle's Anti-lock Braking System (ABS) continuously monitors wheel speed sensors to regulate braking force at each wheel independently. This advanced safety system prevents wheel lockups that could cause dangerous skidding during sudden stops.

While the ABS isn't noticeable during normal driving conditions, the system operates continuously in standby mode. It springs into action during critical moments such as sudden braking or hazardous road conditions. This helps you maintain vehicle control when you need it most.

When the ABS detects that a wheel is about to lock, it automatically modulates brake pressure by rapidly pumping the brakes (sometimes up to 15 times per second). This pulsing action maintains traction and steering control, which is essential during emergency stops or when driving on wet, icy, or slippery surfaces.

What happens when an ABS module goes bad

Like other automotive parts (especially electronic modules), the ABS module is prone to failure. The actual module failure won’t necessarily cause a catastrophic event on the road, but you’ll likely see some warning lights, and your speedometer may stop working. Unlike certain other modules, you can usually continue to drive with a faulty ABS module, but it’s extremely important to get it fixed as soon as possible.

What are the symptoms of a failed ABS module?

The most common symptoms of a faulty ABS module include:

• All ABS warning lights are on
• Loss of communication with the ABS module (code U0121)
• ABS Pump Codes
• ABS pump stuck on
• Internal failure codes (specific codes vary based on the vehicle)
• Wheel speed sensor issues
• The speedometer not working

You may also experience other issues such as sporadic speedometer readings, VSA solenoid valve malfunction codes, and the ABS pump not running. It’s important to do research for your specific vehicle to be able to perform the proper troubleshooting steps.

Do you have to program a new ABS module?

In most cases, a replacement ABS module requires programming to match your specific vehicle. Modern ABS systems are integrated with your car's communication network and need to be configured with the correct VIN and any other vehicle-specific parameters. Attempting to install an unprogrammed module will usually result in the ABS system remaining inactive and warning lights staying illuminated.

Can an ABS module be repaired?

Yes, ABS module repair is possible in many situations. This is often the fastest and most affordable way to get your vehicle back up and running properly. At Circuit Board Medics, we offer a wide variety of ABS module repair services. By repairing rather than replacing, you’re saving time and money. No trip to the dealership is required since your original programming is retained. When we remanufacture ABS modules, we address the root cause of the failure, and take steps to protect against future problems. The result is a product you can trust – backed by a comprehensive warranty.

How long does it take to fix an ABS module?

Once you remove your ABS module, you simply need to ship it to us. Once we receive it, the repair only takes one business day before it’s shipped back to you. If you’re in urgent need of repair, most of our services also have a same day option available – further reducing your time without a vehicle.

If you’re in need of an ABS module repair, browse our full catalog for options. Once you find your part, just place the order and you’ll receive an email with instructions for shipping. If you have any questions or need help troubleshooting your vehicle, give us a call at (800) 547-2049. We look forward to serving you!