What is the reason for the ABS light to come on?
3 Answers
ABS light coming on indicates a fault in the ABS system. The Anti-lock Braking System is an active safety system in vehicles, also known as the ABS braking system. It mainly consists of the ECU control unit, wheel speed sensors, brake pressure regulating devices, and brake control circuits, among other components. The function of ABS is to automatically control the braking force during vehicle braking, preventing the wheels from locking up to ensure maximum traction between the wheels and the road surface. Solutions for the ABS light coming on: 1. Carefully inspect the wiring and connectors to check for poor contact or damage; 2. Check the installation gap and position of the wheel speed sensor and the gear ring, as well as any contamination from dust or impurities; 3. Examine whether the wheel bearing gap is too large and adjust it to the normal value; 4. Avoid high-speed driving and sudden braking, and seek inspection and repair at a 4S shop as soon as possible.
I've been driving for over a decade, and the ABS light coming on is one of the common issues. Most of the time, it's because the sensor is too dirty or one of the wheel sensors is faulty, triggering a warning signal from the control module. When the light is on, it means the anti-lock braking system isn't functioning, making the wheels more prone to locking up during braking—especially dangerous in rain, snow, or on slippery roads. Once, on the highway, my ABS light suddenly came on, and I was so alarmed that I slowly drove to a rest area to check. It turned out the right front wheel sensor connector was loose, and securing it fixed the problem. My advice is not to delay when the light comes on—get it checked by a professional shop because brake issues directly impact safety. Ignoring it could lead to loss of control in emergencies and cause accidents, especially as the car ages and parts wear out. Regularly cleaning the undercarriage during car washes can help reduce the risk.
I'm quite curious about minor car issues. The ABS light usually indicates an abnormality in the sensor or control unit. Common causes include errors in wheel speed sensor data collection, which may be clogged by mud, have loose connections, or be completely damaged. When the control module detects an error code, it illuminates the warning light. You can try resetting the system by disconnecting the battery for a few minutes and check the ABS-specific fuse in the fuse box to see if it's blown. Simple DIY fixes sometimes work, but if the light stays on, you'll need a diagnostic tool to read the fault codes. Avoid blindly disassembling sensitive components, as messing with the wiring can make repairs more difficult. Basic braking still works when the light is on, but the ABS function is disabled, which may cause tires to skid during emergency braking. Regularly cleaning the sensor areas can prevent some problems.
