Causes and solutions

ABS, short for Anti-lock Braking System, is an active safety feature equipped on many modern vehicles. When this system is active, sensors at the front and rear of the wheels collect information and send it to the ECU (Electronic Control Unit). If it detects a risk of wheel lock-up, the ECU adjusts the pressure applied to the brakes by opening and closing the brake fluid valves, preventing the wheels from locking up.

When the ABS warning light stays on continuously, it indicates a problem with your vehicle's anti-lock braking system. Here are some troubleshooting steps you can take.

The car's ABS warning light is on.

Check the parking brake.

First, check that the parking brake is fully engaged. Sometimes, an improperly engaged parking brake can also cause the ABS warning light to come on. Make sure the parking brake is fully engaged and check that the warning light turns off.

Check the brake fluid level.

Low brake fluid levels can reduce pressure in the ABS braking system, leading to poor braking performance. Check the brake fluid level and add more if necessary. This ensures sufficient fluid pressure in the system for proper ABS operation.

Check the brake fluid lines.

On vehicles equipped with ABS systems, the brake fluid lines are split into two circuits: one for the front wheels and one for the rear wheels. If either circuit leaks, the fluid pressure will drop and the ABS warning light will illuminate. Carefully inspect the brake fluid lines to detect and repair any leaks promptly.

Check the ABS sensors.

The ABS system operates primarily based on signals from speed sensors located in the wheel hubs. Given Vietnam's humid and rainy climate, these sensors are susceptible to damage from water, dirt, or mud. Inspect and clean these sensors to ensure they send accurate signals to the ECU.

Restart the car.

After inspecting and cleaning the sensors, turn off the engine and restart the vehicle. If the ABS warning light remains on, the system may require further inspection.

Take the car to the garage.

If the ABS warning light remains on after performing the steps above, you should take your vehicle to a reputable garage or service center for a thorough inspection and repair. There may be more serious issues related to the electrical system or the ABS ECU.

Source: https://www.congluan.vn/den-bao-abs-o-to-bat-sang-nguyen-nhan-va-cach-xu-ly-post296465.html