What Causes Both the Anti-Slip and ABS Lights to Illuminate?
2 Answers
The reasons for both the anti-slip and ABS lights illuminating include wheel speed sensor failure, wheel speed sensor circuit failure, and ABS pump failure. Wheel Speed Sensor Failure: Use an automotive diagnostic computer to read the data stream of the wheel speed sensor and analyze whether the sensor's data matches the actual data to confirm this fault. If the wheel speed sensor fails, it cannot transmit correct data to the ABS pump, causing both the ABS and anti-slip lights to illuminate. The solution is to replace the wheel speed sensor, which is free of charge at authorized 4S shops during the warranty period. Wheel Speed Sensor Circuit Failure: A technician can lift the vehicle with a lift and inspect the wheel speed sensor's connecting circuit for damage, deformation, or loose plugs to confirm this fault. If the wheel speed sensor circuit fails, the sensor cannot function, leading to the illumination of both the ABS and anti-slip lights. The solution is to repair the circuit. If not caused by human factors, the repair is free of charge at authorized 4S shops during the warranty period. ABS Pump Failure: Use an automotive diagnostic computer to read the ABS pump's data stream and analyze whether its working state is normal. Then, use a multimeter to measure the ABS pump's resistance value and check if it falls within the normal range. If the resistance value is outside the normal range, this fault can be confirmed. ABS pump failure renders the ABS system unusable, causing both the ABS and anti-slip lights to illuminate. The solution is to replace the ABS pump, which is free of charge at authorized 4S shops during the warranty period.
I've encountered this issue before. While driving, both the anti-skid and ABS lights came on simultaneously, which really freaked me out. I asked a mechanic, who said the most common cause is a faulty wheel speed sensor. The sensors can easily get covered in dust or water, leading to signal loss. Another possibility is loose or corroded wiring, or aging connectors causing poor contact. In severe cases, problems with the ABS control module or a blown fuse can also trigger both lights to come on. Safety-wise, this means the braking and anti-skid systems may fail, making it easy to skid or lose control on slippery roads. I immediately slowed down, pulled over to check, and went to a repair shop to replace a sensor, which fixed the problem for just a few hundred bucks. Regularly cleaning dirt around the wheels can prevent this issue. Don't delay fixing it—small problems can worsen if not addressed promptly. I recommend reading OBD fault codes to quickly pinpoint the problem.
