ABS warning lamp that comes on and off: what to do?
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ABS warning lamp that comes on and off: what to do?

ABS is a safety system installed on your car to prevent the wheels from locking during more or less intensive braking. The ABS warning light on your dashboard may come on when you start the engine or while driving. In some situations, it may turn on and then suddenly turn off.

🚗 What is the role of ABS?

ABS warning lamp that comes on and off: what to do?

TheABS (Anti-lock braking system) - a device that allows you to adjust the pressure Wheels using a hydraulic block. His work is mainly provided by the presence calculating electronic and multiple sensors, in particular on wheels : These are wheel sensors. The computer controls the actuators and the ABS warning light in the event of a problem.

Thus, ABS guarantees the driver control over his vehicle in any situation. Without it, the trajectory of the car can no longer be controlled when it rains or snows, and the wheels will lock, increasing braking distances a car.

Having become mandatory under European regulations, this tool is present in all vehicles built after 2004... ABS has become an important system to ensure controlled braking especially during harsh and emergency braking. It also plays a key role in ensuring the comfort of the driver and his passengers.

🛑 Why does the ABS warning light come on?

ABS warning lamp that comes on and off: what to do?

Your vehicle's ABS warning light may come on spontaneously when the car is on or while driving. The indicator can light up for several reasons:

  • Wheel sensor damaged : In case of damage, it will send a wrong signal to the ABS system. It can also be covered with dirt, in which case it should be cleaned.
  • Malfunction in the hydraulic block : it is necessary to change the block as soon as possible.
  • Malfunction in the computer : this will also need to be replaced.
  • Blown fuse : it is necessary to replace the corresponding fuse so that the indicator goes out for no reason.
  • Communication problem : This could cause a short circuit or cut the harness.
  • Broken computer : Since the information is no longer circulating, the indicator will light up. You must change your calculator.

All of these reasons jeopardize your safety on the road, because they worsen vehicle grip on the road when braking or in severe weather conditions (rain, snow, ice).

⚡ Why does the ABS warning lamp come on and then go out?

ABS warning lamp that comes on and off: what to do?

If the ABS warning light behaves in this way, it means that there are serious malfunctions in its system, such as:

  1. Sensors and connectors in poor condition : they must not be damaged, no cable must be cut or cracked in the sheath.
  2. Contamination on the sensor : There may be dust or dirt on the ABS sensor that gives incorrect information. This explains why the light comes on and then goes out; therefore, the sensor must be cleaned in order for it to communicate properly with the system.
  3. ABS block that is no longer waterproof : it is necessary to see if this has lost its tightness. In this case, the light will light up randomly. Thus, you will have to replace the latter's gasket.
  4. Level of brake fluid inadequate : Necessary for good braking, there may not be enough brake fluid in the system. The ABS warning lamp may come on in addition to see brake fluid.
  5. Counter dashboard stop : The problem is with the ABS ECU and the warning light comes on intermittently.
  6. Your battery is faulty : charged by the electrical part of the car, if the battery is not installed correctly, the ABS warning light may come on.

The best solution you can turn to if you are experiencing these symptoms is a visit to a mechanic. He can use diagnostic case, analyze the error codes of your entire vehicle and find the source of the malfunctions.

💸 How much does it cost to replace an ABS sensor?

ABS warning lamp that comes on and off: what to do?

Depending on the model of your vehicle, the cost of replacing an ABS sensor can range from one to two. The average range is from 40 € and 80 €... The mechanic will replace the sensors and set them up in the car's computer.

However, if the issue is with a hydraulic blog or calculator, the note will be much more expensive and could end up in 1 200 €, details and work are included.

As you understand, ABS is an important device that guarantees the reliability of your car on the road. If the ABS warning light is behaving unusually, it's time to make an appointment with a mechanic. Compare the garages closest to you with our comparator and trust your car to one of our trusted garages for the best price!

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