A steady ABS light on your 2020 Defender usually points to a wheel speed sensor, wiring, or tone ring issue.
Here’s what to check first and how to drive safely until it’s fixed.
Don’t panic — but don’t ignore that amber ABS light
On a 2020 Land Rover Defender, a continuously lit ABS warning light usually means the ABS control module has logged a fault and disabled the system until it’s repaired. The most common culprit is a wheel speed sensor or its wiring, but it can also be a dirty or cracked tone ring, wheel-bearing play, low battery voltage, or an ABS module/software issue. Because ABS and stability control may be unavailable, treat it as a “get it diagnosed soon” warning rather than a cosmetic annoyance.
Start with a proper scan using Land Rover-compatible diagnostics, then watch live wheel-speed data on all four wheels while driving slowly. A sensor dropping out, reading erratically, or showing a different speed to the others is a strong clue. Next, inspect each sensor’s connector and harness for corrosion, chafing, or moisture, and check the tone ring/reluctor for dirt, cracks, or missing teeth. Also check wheel-bearing play and battery/charging voltage before condemning the ABS module.
Read the full breakdown in the Knowledge Base
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