Pajero Sport III ABS Light Stays On: Wheel Speed Sensor Fix

Why Your Pajero Sport III ABS Light Won't Go Off

When the ABS light stays on continuously, the system has detected a fault and disabled itself. On the Pajero Sport III, the most common culprit is a wheel speed sensor — a small magnetic pickup at each wheel that tells the ABS module how fast each wheel is turning. If one sensor drops out, the module can't compare speeds, so it turns on the warning light and shuts down ABS, traction control, and stability control. It's usually not a sign of catastrophic brake failure, but it does mean you've lost the safety net.

Likely Causes & What to Check First

• Wheel speed sensor itself — dirty, cracked, or internally failed. This is the #1 cause.
• Wiring or connector — corroded pins, broken wires, or chafed harness near the wheel arch.
• Reluctor ring (tone ring) — rusted, cracked, or missing teeth on the hub or axle.
• ABS module or pump — less common, but possible if all sensors test fine.

Start by scanning the ABS module for fault codes with a capable diagnostic tool. That will tell you which wheel is affected. Then inspect that sensor's connector, wiring, and the reluctor ring. A multimeter can check sensor resistance, but the most reliable test is live data: watch each wheel speed reading while spinning the wheel by hand. If one stays at zero or jumps erratically, you've found the problem. Clean the sensor tip and ring first; sometimes metal debris or mud is all it is.

Is It Safe to Keep Driving?

You can usually drive short distances, but treat the ABS light as a serious warning. Your base brakes still work, but ABS will not activate in an emergency, so wheels can lock and you may lose steering control during hard braking. Traction and stability control are also offline, which matters in rain or on gravel. If the light is on steady, avoid highway speeds, wet roads, and heavy loads until you get it fixed. If it flashes or the brake pedal feels strange, stop driving and call a mechanic. A wheel speed sensor replacement is typically quick and affordable — don't put it off.

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