Land Rover Discovery V ABS Light On: What to Check First

Why the ABS light stays on

On a Discovery V, a continuously lit ABS warning almost always means the ABS control module has disabled the system because it has seen an implausible or missing signal. The most common culprit is a wheel speed sensor or its connector/harness at one of the hubs — especially where road spray, grit and corrosion get in. A damaged tone ring, excessive hub bearing play, chafed wiring or, less often, an ABS module fault can produce the same symptom.

I would not throw a sensor at it blindly. A Land Rover-capable scanner should be your first stop: read the ABS codes and watch live wheel-speed data while driving. If one wheel’s reading drops out or reads differently from the others, you’ve narrowed it down quickly.

What to check first

• Scan the ABS module for stored codes and freeze-frame data before clearing anything.
• Inspect each wheel speed sensor, connector and harness for corrosion, rubbing or broken clips; the rear ones see plenty of road spray.
• Check the tone ring/reluctor ring and hub bearing play — debris or a worn bearing can mimic a bad sensor.
• Verify battery voltage and charging; low voltage can set odd ABS faults on modern Land Rovers.

Is it safe to keep driving?

If the ABS light is on steadily and the brakes feel normal, you can usually drive carefully to a garage — but remember that ABS, traction control and stability control may be inactive. Avoid slippery roads, hard emergency stops and towing until it’s fixed. If you also see a red brake warning, a spongy pedal, grinding or any loss of braking performance, stop driving and get it recovered.

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