A permanently lit ABS warning light usually points to a faulty wheel speed sensor. Learn the likely causes, which parts to inspect, and whether it’s safe to drive your Alphard III.
Why Is the ABS Light Always On?
If the ABS warning light on your Toyota Alphard III stays lit continuously, the system has detected a fault and disabled itself. In most cases, the culprit is a failed or dirty wheel speed sensor — a small magnetic component mounted behind each wheel hub that monitors how fast that wheel is turning. When one sensor stops sending a signal, the ABS computer can no longer compare wheel speeds, so it turns the warning light on and stores a trouble code.
