ABS Light Stays On in Your Jeep Grand Cherokee V: Wheel Speed Sensor Troubles

Why Is the ABS Light On?

When the ABS warning light stays on continuously in your Jeep Grand Cherokee V, the system has detected a fault and has disabled itself. The most common culprit is a faulty wheel speed sensor. Each wheel has one of these sensors, and they measure how fast that wheel is turning. When the ABS module sees a missing or erratic signal, it turns on the warning light to let you know there's a problem.

What to Check First

Start with a scan tool to read the ABS trouble codes. That will tell you which wheel is causing the trouble. Then inspect that sensor and its wiring. Here's what to look for:

• Wheel speed sensor: Check for physical damage, corrosion, or a worn tone ring. A sensor coated in metal shavings is a common failure.
• Wiring and connector: Look for broken wires, chafed insulation, or a loose connector. The harness near the suspension is particularly prone to damage.
• Sensor gap: Make sure the sensor is mounted correctly and not bottomed out or too far from the tone ring.

Is It Safe to Drive?

You can still drive the vehicle with the ABS light on, but you'll lose anti-lock braking and stability control. On dry pavement, normal braking still works, but in an emergency stop or on slick roads, the wheels could lock up, causing a skid. If the red brake warning light also comes on, stop driving immediately and have it inspected, as that could indicate a hydraulic problem. To be safe, get the sensor diagnosed and replaced soon.

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