ABS Light Stuck On in Your BYD Qin Plus? Start With These Wheel Speed Sensor Checks

Why the ABS Light Stays On

When the ABS warning light on your BYD Qin Plus stays on continuously, it means the anti-lock braking system has detected a fault and disabled itself. The most common culprit is a wheel speed sensor. Each wheel has one of these sensors, and they tell the ABS module how fast the wheel is spinning. If one fails or sends an inconsistent signal, the system logs a fault and lights up the dashboard.

What to Check First

Start with the easiest and most common causes before replacing any parts:

• Dirt or debris on the sensor tip – A simple buildup of grime can block the magnetic signal. Remove the sensor and clean its tip with a cloth.
• Damaged sensor wiring – Look for chafed, broken, or corroded wires leading to the sensor and its connector. A loose or corroded plug is often the real problem.
• Tone ring / reluctor wheel damage – The toothed wheel the sensor reads can have missing teeth, cracks, or rust buildup that interrupts the signal.
• Sensor not properly seated – If there's an air gap between the sensor and the tone ring, or the sensor is loose, the signal will be erratic.

If you have an OBD-II diagnostic tool, read the ABS trouble codes. A code like C0031 or C0040 will tell you exactly which corner is affected. That saves you from guessing and lets you focus on the right wheel.

Is It Safe to Keep Driving?

Yes, you can still drive the Qin Plus, but with caution. The basic hydraulic brakes will work, so the car will stop. However, the ABS, electronic stability control, and often traction control will be disabled. On dry roads, this is rarely a problem. But on wet, icy, or uneven surfaces, the wheels may lock up during hard braking, increasing the risk of a skid. I recommend getting it diagnosed as soon as possible, especially if the light comes on along with the brake warning light, which could indicate a serious hydraulic issue. Please limit your driving and avoid emergency maneuvers until it's fixed.

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