Geely Monjaro ABS Light On? Don't Panic – Here's What to Check

If your Geely Monjaro's ABS warning light has decided to stay on permanently, it's easy to feel a little uneasy – but this is one of the most common electronic niggles in modern SUVs. In the vast majority of cases, the culprit is a faulty wheel speed sensor rather than a serious mechanical failure. That little sensor sits behind each wheel hub and tells the ABS module how fast each corner is turning; when one sensor gives up, the module gets confused and simply turns the whole system off, leaving the warning light glowing on your dash.

Most Likely Causes

• Failed wheel speed sensor: The magnetic or Hall-effect sensor itself may have worn out or be damaged by heat, moisture, or road debris.
• Damaged wiring or connector: Corrosion, a chafed wire, or a loose plug at the sensor end can break the signal completely.
• Contaminated or damaged tone ring: The toothed ring (reluctor) that rotates with the wheel bearing can rust, crack, or pick up metallic debris, distorting the sensor's signal.
• ABS module issues: Less common, but an internal fault in the control unit can cause the same symptom – especially after a battery jump start or voltage spike.

What to Check First

• Read the fault codes: A simple OBD-II scan will tell you exactly which wheel's sensor is suspect – this saves you from guessing.
• Inspect the connector and wiring: Look for corrosion, bent pins, breaks, or anything rubbing against the suspension arm.
• Clean the sensor tip and tone ring: Sometimes a gob of metallic brake dust is enough to block the signal. Remove the sensor, clean it, and check the ring for damaged teeth.
• Measure resistance: A digital multimeter across the sensor terminals typically shows a specific ohm range (check your manual), which quickly reveals an open or shorted sensor.

Is It Safe to Keep Driving?

In a word – mostly. Your Monjaro's normal hydraulic brakes are still fully operational, so you won't lose stopping power in everyday driving. However, the anti-lock braking system and electronic stability control will be disabled, meaning the wheels can lock up under hard braking or low-grip conditions. That can be dangerous on wet roads or in an emergency swerve, so I'd treat this as a 'get it checked this week' issue rather than an 'ignore it' one. If the light is accompanied by a soft pedal, vibration, or pulling, stop driving immediately and have the car recovered – but a steady ABS light alone is not an immediate fire alarm.

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