What causes the ABS and ESP warning lights to illuminate in the BYD Song?
4 Answers
The reason for the illumination of the ABS and ESP warning lights in the BYD Song: There is a malfunction in the vehicle's ABS anti-lock braking system and the ESP stability control system. The ABS indicates a brake system fault, while the ESP is an anti-skid warning light. Since the ABS and ESP systems are related to driving safety, it is important to promptly contact the dealer and arrange for repairs. The BYD Song is a compact SUV under the BYD brand. Taking the Song 2021 Classic Edition 1.5T Manual Comfort model as an example, its body dimensions are 4600mm in length, 1830mm in width, and 1700mm in height, with a wheelbase of 2660mm. The body adopts a 5-door, 5-seat configuration. In terms of power, the Song 2021 Classic Edition 1.5T Manual Comfort is equipped with a 1.5L inline 4-cylinder turbocharged engine, delivering a maximum power of 118kW and a maximum torque of 245Nm, paired with a 6-speed manual transmission.
Seeing the ABS and ESP warning lights on in my BYD Song, I bet you felt just as panicked as I did the first time! ABS stands for Anti-lock Braking System, while ESP is Electronic Stability Control—both rely on wheel speed sensors to monitor the wheels. If these sensors get clogged with mud, oil, or simply wear out, the signals get disrupted, triggering the warning lights. Wiring issues are also common culprits, like loose connections or corroded power supplies. A faulty ABS pump or control module could also be the cause. Safety first! When these lights come on, your braking performance might be compromised, especially on slippery roads, so don’t push your luck—head to a repair shop ASAP for a diagnostic scan. For prevention, I make it a habit to keep the wheels clean and wipe down the sensor areas during car washes. During regular maintenance, I also ask the technician to check the related circuits to avoid costly repairs down the road.
Last time when I was driving my BYD Song, both the ABS and ESP warning lights suddenly came on, which really made me nervous, fearing an accident might happen. I pulled over safely and recalled what my mechanic friend had mentioned—the issue often lies with the wheel speed sensor, either due to water damage or dirt covering it, causing signal loss. It could also be a blown fuse or a short circuit. Later, I had the car towed to the 4S shop, where they found the left front wheel sensor was damaged. Replacing it fixed the problem. My advice is: once these lights appear, don’t push your luck—slow down, pull over immediately, and get a professional inspection, because braking safety is no joke. For daily driving, I make a habit of avoiding waterlogged roads to prevent sensor moisture and conduct regular checks to minimize unexpected failures.
The ABS and ESP lights come on for a few simple reasons: the most common is a faulty wheel speed sensor, which can be blocked by dirt or fail itself, interrupting the signal; wiring issues like loose connectors or short circuits causing fuses to blow; or bugs in the ABS module or computer system. The lights serve as a warning that braking functionality is compromised, so it's safest to pull over and get it checked immediately. Avoid tampering with it yourself—professional diagnosis is the most reliable.
