BYD Tang ABS Light On? Wheel Speed Sensor Faults Explained

When your BYD Tang's ABS warning light stays on continuously, the most common culprit is a failing wheel speed sensor. These sensors are the ABS system's eyes on each wheel, telling the control module how fast each wheel is rotating. A single bad sensor can trigger the warning and disable anti-lock braking.

Likely Causes

• Failed wheel speed sensor – internal short, open circuit, or corrosion.
• Dirty or damaged tone ring – the toothed ring next to the sensor can accumulate debris or get chipped.
• Wiring or connector issue – a broken wire or loose connector, often from road debris or vibration.
• Sensor gap problem – if the sensor is pushed too far or not fully seated.

What to Check First

Start with a scan tool that can read live ABS data. Compare the wheel speed values from all four corners while driving slowly. The faulty sensor will usually show 0 km/h or an erratic reading. Then inspect that sensor's wiring and connector for damage, and clean the sensor tip and tone ring if accessible.

Is It Safe to Keep Driving?

You can still drive the BYD Tang, but keep in mind that the ABS function is turned off. Normal hydraulic braking still works, so the car will stop, but in slippery or emergency conditions you could lock up the wheels. It's best to get it diagnosed and replaced soon, especially if you drive on wet roads regularly.

This material is AI-generated and for informational purposes only — it does not replace an in-person diagnosis by a qualified mechanic.