ABS Light Stays On in Your BYD Han? It’s Likely a Wheel Speed Sensor

Why the ABS Warning Light Stays On

When the ABS light stays on continuously in your BYD Han, the most common culprit is a faulty wheel speed sensor. These sensors monitor each wheel’s rotation and send data to the ABS control unit. If a sensor fails, gets contaminated, or has a broken wire, the system can’t read wheel speed and turns on the warning light.

Which Sensors to Check First

Start by inspecting all four wheel speed sensors, but pay special attention to the front-left and rear-left sensors—they tend to collect more road debris. Look for:

• Physical damage – cracked sensor housing or frayed wiring
• Contamination – mud, rust, or metal shavings on the sensor tip or tone ring
• Loose or corroded connectors – especially after driving through deep water

If the sensor looks clean, the issue may be a chipped or broken tone ring (the gear-like wheel inside the hub), which can happen from potholes or curb impacts.

Is It Safe to Drive?

Yes, you can still drive your BYD Han with the ABS light on, but only with caution. The standard hydraulic brakes will work normally, but the anti‑lock braking system (ABS) is disabled. That means in a hard stop, the wheels could lock up, especially on wet or slippery roads, making steering difficult. Avoid sudden braking and slick surfaces. Have a mechanic diagnose the issue promptly—most sensor replacements are straightforward and affordable.

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