VW Amarok II ABS Light Stays On: Wheel Speed Sensor Troubles, Check These First

Why the ABS Light Stays On in the Amarok II

On the Volkswagen Amarok II, a permanently lit ABS warning light is most often caused by a faulty wheel speed sensor or a damaged sensor ring. Each wheel has a sensor that reads a toothed ring to measure wheel speed. When one sensor fails or sends an inconsistent signal, the ABS module can't trust the data and switches the system off, turning on the warning light. Corrosion, dirt, or a small stone caught in the sensor gap are common culprits, especially after off-road driving or in winter salt.

Which Sensors and Parts to Check First

Start with the rearmost sensors, as they tend to collect more dirt and are exposed to water spray.

• Front and rear wheel speed sensors – inspect the connectors for moisture, corrosion, or bent pins.
• Sensor wiring harness – look for chafed or broken wires near the suspension and brake lines.
• Reluctor rings (ABS tone rings) – check for cracked, missing, or damaged teeth that can fool the sensor.
• Sensor tip and gap – remove the sensor, clean the tip with brake cleaner, and verify the air gap is even.

A simple OBD-II scan with a VW-compatible reader will tell you which wheel is affected by a specific fault code like C109D or C1160. If the sensor itself is fine, the issue could be a failing ABS module or a blown fuse, but these are less common.

Is It Safe to Keep Driving?

You can still drive with the ABS light on, but the anti-lock braking system is disabled, and in an emergency stop the wheels can lock up, especially on gravel or wet roads. Your normal brakes will still work, and the Amarok II's electronic stability control may also be limited. Drive calmly and avoid hard braking until you've fixed the sensor. Have it checked soon, because a bad wheel speed sensor can also confuse the speedometer and transmission shift points on some models.

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