ABS Light Stays On in a Lynk & Co 03? Here's What to Check First

Why the ABS Light Stays On

When the ABS light doesn't go out, the system is telling you it's detected a fault and has disabled itself. On the Lynk & Co 03, the most common culprit is a faulty wheel speed sensor. These sensors sit at each wheel and send rotation data to the ABS control unit. A broken sensor, corroded connector, or damaged wiring can easily trigger the light. Also worth remembering: in many cases, the sensor itself is a separate, replaceable part — you don't necessarily have to replace the entire wheel bearing or hub assembly. But it does depend on your specific model and year, so it's a good idea to confirm the exact part layout before ordering anything.

What to Check and How to Narrow It Down

Here's a sensible order of checks if you're comfortable digging in yourself:

• Plug in an OBD2 scanner — read the ABS trouble codes. A code like “C0030” or “wheel speed sensor circuit” will tell you which wheel is involved.
• Inspect the suspect sensor and wiring — look for physical damage, corrosion, or a broken wire near the wheel well. Often the connector is the weak point.
• Check the tone ring — that's the toothed ring the sensor reads. On some models it can crack, collect rust, or accumulate debris, giving a false signal.
• Test the sensor’s output — with a multimeter, you can usually measure resistance or AC voltage while turning the wheel. If you're not sure what readings to expect, a repair guide for your exact model is helpful.

If the sensor is confirmed bad, replacing just that sensor is usually sufficient. In many Lynk & Co 03 models, the sensor is an independent component, not part of a larger assembly. That said, if the sensor is pressed into the hub and the hub has bearing wear, you may need to address both — but don't assume the whole hub requires replacement until you've confirmed the sensor can't be serviced separately.

Is It Safe to Keep Driving?

With the ABS light on, your normal braking system still works, so you won't lose the ability to stop. What's missing is the anti-lock function — your wheels could lock up during a hard stop or on slick roads, especially in snow or rain. Also, on many modern cars, the same wheel speed sensors feed the traction and stability control systems, so those are likely switched off too. That means you should drive more cautiously and avoid sudden maneuvers. It's not an immediate “stop the car” situation, but it's definitely something to have diagnosed soon. A simple sensor swap is a relatively low-cost repair, and it restores all the safety systems you're used to.

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