ABS Light Staying On in Your Mitsubishi L200 VI? Start With the Wheel Speed Sensors

Why Your L200 ABS Light Stays On

On the Mitsubishi L200 VI (the 2015-on Triton), the ABS light runs a self-test each time you start up and then goes out. If it stays lit, the ABS control unit has found a fault and, in most cases, has switched the anti-lock function off to protect itself. A steady light is almost always a stored fault code waiting to be read, and on this generation of L200 the most common culprit by far is a wheel speed sensor or the wiring that feeds it.

These trucks work hard. Mud, grit, water crossings, pressure washing and heavy loads punish the parts that live right next to the wheels. The front sensor harness runs down near the strut and wheel arch where it can rub through or take a hit from debris, and the rear sensors sit on the axle, constantly exposed to dirt and water. A corroded connector, a sensor tip packed with metal filings, a cracked or rusted tone ring, or wheel bearing play that changes the air gap will all trigger the same warning. Less common causes include low brake fluid, a blown ABS fuse, low battery voltage while cranking, a poor earth, or a failing ABS pump or module — which is exactly why reading the codes beats guessing and swapping parts.

What to Check First, In Order

Work through these steps and you will normally find your fault in under an hour:

• Read the ABS fault codes with a scan tool that can talk to the ABS module. A code naming a specific wheel cuts your diagnosis time in half.
• Inspect that sensor and its harness. Look for chafed, stretched or broken wires, water or green corrosion inside the connector, and a sensor tip covered in metal debris. Clean it gently and check the mounting.
• Check the tone ring. Cracked teeth, rust, mud packed between the teeth or a missing segment all upset the signal. Clean it and look closely.
• Compare live wheel speeds. Drive slowly in a straight line with the scan tool displaying all four values. The wheel that reads zero, jumps around or differs from the rest is your faulty circuit.
• Test electrically. Measure sensor resistance against the specification, then spin the wheel by hand and watch for a small AC voltage on a multimeter. No signal, no good.
• Then check wheel bearing play, the air gap, brake fluid level, ABS fuses and battery condition if everything above looks fine.

Is It Safe to Keep Driving?

You can usually drive, but be honest about the trade-off. Your normal hydraulic brakes still work, so you will stop. What you have lost is the anti-lock function, so in hard braking on wet, gravel or uneven ground the wheels can lock, steering control disappears and stopping distances grow. Traction and stability control may be disabled too. For a loaded L200 or a truck used on site, that is a real difference, not a cosmetic warning.

So treat the light as a job for this week, not this year. Drive more gently, leave a bigger gap, skip heavy towing and do not test your luck in the rain. A simple sensor or connector repair is cheap; the same fault ignored for months often becomes an ABS pump or module bill. Stop driving and get it recovered if the red brake warning light comes on alongside it, if the pedal feels soft or long, or if the ABS light flashes or you hear the pump running constantly.

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