What Causes the ABS Warning Light to Illuminate?
2 Answers
Here are the specific reasons why the ABS (Anti-lock Braking System) warning light may illuminate: 1. Voltage and fuse issues: Low battery voltage or blown fuse. 2. Wiring connection problems: Broken ABS system wires, loose connectors, or improperly seated relays. 3. Vehicle component failures: Faulty wheel speed sensors; malfunctioning hydraulic control unit; defective electronic control unit, etc. Note: When the ABS warning light comes on, vehicle owners must take it seriously by promptly stopping and arranging for inspection/repair at a 4S dealership to prevent traffic accidents.
I've been driving for over 20 years and have seen the ABS warning light come on several times. The most common cause is a dirty wheel speed sensor or one covered in mud, leading to signal loss. Damage to the ABS module or electrical issues can also trigger the light, such as a blown fuse or aging wiring. Low or leaking brake fluid is another factor, as the system relies on hydraulic pressure. Never ignore the warning light—it means the ABS system has failed, increasing the risk of wheel lock-up and skidding during braking. Safety first: get it checked as soon as possible. Start by cleaning the sensor; if that doesn’t work, visit a professional repair shop. Remember, having the system tested during regular maintenance can prevent these minor issues.