Q: What is the anti-lock brake self-test?

asked by on

What is the anti-lock brake self-test?

A: The anti-lock braking system (ABS) on your ...

The anti-lock braking system (ABS) on your car is designed to conduct a self-test every time you crank the engine. During the test, the ABS light on the dash will turn on, and then should go out after a few seconds. The system is checking itself to ensure that everything is in working order. If the ABS light does not go out after a few seconds, you should have your car inspected immediately, as it indicates a problem.


  • It’s normal to hear a clunking noise during the self-test.

  • It’s possible that you’ll feel a pulsation in the brake pedal during the self-test. This is normal.

  • If ABS isn’t working or has been disabled, you will still have normal braking capabilities.

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: ABS signal and Check Engine signal

Hello there. I would need a better description of any symptoms your car is experiencing for more precise advice. There are at least eight sensors on the engine. The camshaft or crankshaft sensor are a couple of the most common...

Q: Where do I find the tire and loading information label?

Your car has very specific requirements when it comes to tire size, air pressure, maximum vehicle weight, towing capacity and more. All of this information and more can be found on the tire and loading information label. You’ll find this...

Q: Motor missing while accelerating

In older vehicles, misfires during acceleration or under load are usually due to faulty spark plug wires. Other things like carburetor not adjusted properly, or weak valve springs can also cause misfires during acceleration. I would suggest seeking help form...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.