5 Causes of “ABS Light Comes On” in Your Car

The ABS light corresponds with the anti-lock braking system of your vehicle. This braking system was designed to prevent the vehicle from skidding so much while the driver presses down on the brake pedal. This is really a safety system for braking because skidding would cause an accident. If you are driving your vehicle and its wheels do not rotate anymore, the ABS will automatically allow braking fluid to be released. This fluid creates the necessary pressure needed to keep the wheels rotating. That way, your wheels won’t lock up on the road and cause you to skid. As a result, you will be able to maintain control over your driving.

5 Causes of “ABS Light Comes On

When the ABS light illuminates on the dashboard, this is a warning light which indicates that something is wrong with your anti-lock braking system. You should take this warning very seriously because now the wheels of your vehicle may start skidding on the road. If you normally drive in environments that have icy roads or wet roads, then driving a vehicle with a malfunctioning ABS could be a deadly mistake.

To help you determine what is going on with your anti-lock braking system, below are the top 5 causes of your ABS Light coming on.

1. Malfunctioning Speed Sensor

The speed sensors in your wheel hubs must always be accurately measuring the speed in which the wheels are turning. If you have a malfunctioning speed sensor in any one of the wheel hubs, your engine control unit might think this wheel is not moving fast enough because it cannot get an accurate measurement of its speed. As a safety precaution, the braking pressure will increase to ensure the anti-lock brakes remain effective. However, the engine control unit will know something is wrong with the sensor. This will cause the ABS light to illuminate.

2. Low Braking Fluid

Your anti-lock brakes depend on braking fluid because it creates the necessary pressure for them to function. If you have a low amount of braking fluid available in your reservoir, there won’t be enough pressure to activate the anti-lock brakes. This would certainly be a reason for the ABS light to turn on. Check your reservoir to make sure there are no leaks because this is often the reason for a low amount of braking fluid.

3. Warning Glitch

In some instances, there may be nothing wrong with your anti-lock brakes at all if your ABS light turns on. You may be driving a vehicle which performs “bulb checks” periodically. This is just an automated safety procedure where the vehicle checks to make sure the lights on the dashboard are turning on properly. The lights will normally turn off on their own after the bulb check is over with. But there could be a circumstance where a light stays on afterward. This could be the case with the ABS light. If you don’t experience any other symptoms with your anti-lock brakes, then consider this being a result of bulb check.

4. Corrosive Module

The anti-lock braking system has a module which keeps it functional. If this module were to get covered with corrosion, then it would limit its functionality. Mainly, the information coming from the speed sensors of the wheels would not be detected so well. The engine control unit will realize this and cause the ABS light to illuminate as a precaution.

Read also: 5 Causes Airbag Light On in Your Car

5. Bad Hydraulic Pump

Hydraulic pumps are used to increase braking pressure in the anti-lock braking system. This ensures that all 4 wheels are touching the ground and not losing their traction. If one of these hydraulic pumps were to wear out or get damaged, it would cause the wheels to move at different speeds than one another. This will immediately cause the ABS light to come on.

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