ABS Light Stuck On in Your TANK 300? Start With the Wheel Speed Sensors

What the light is telling you

On a TANK 300, a steady ABS warning light almost always means the ABS module has detected a fault and switched the system off to protect itself. The good news is that your normal hydraulic brakes still work, so you're not brakeless. The bad news is that ABS and often stability control are offline, so you should drive gently and get it scanned soon. If the light is flashing, the red brake light is also on, or the pedal feels strange, stop and get help rather than continuing.

Check these first

The most common culprit is a wheel speed sensor or its wiring, especially if the SUV has seen mud, water, or rough trails. Start with a proper scan tool that can read the ABS module codes and live wheel-speed data—that will usually tell you which corner is lying to the computer.

• Wheel speed sensors and harnesses: inspect each sensor at the hub, look for chafed wires, corroded connectors, or a sensor knocked out of place.
• Tone rings: rust, mud, or a cracked reluctor ring can make the signal erratic even if the sensor looks fine.
• Brake fluid level and battery voltage: low fluid or a weak battery can trigger warning lights on modern vehicles.
• ABS module and fuses: less common, but a module fault or blown fuse is possible if sensor data and wiring check out.

Don't just replace parts blindly. Compare live wheel speeds while rolling slowly—a sensor dropping to 0 km/h or spiking when it shouldn't is a strong clue. A steady ABS light isn't usually an emergency, but it is your TANK 300 asking for attention before a routine stop turns into a skid.

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