ABS Light Stuck On? Changan CS75 Plus Sensor Guide

What the ABS light is telling you

Seeing the ABS warning light stay on continuously in your Changan CS75 Plus can be unsettling, but it is usually the system telling you it has disabled itself because it cannot trust one of its inputs. On this model, the most common culprit is a wheel speed sensor or its wiring at one wheel. The ABS module needs a clean speed signal from all four wheels; if one signal drops out, the module logs a fault and turns the light on. Other possibilities include a damaged tone ring on the hub, corrosion in a connector, a tired battery, low brake fluid, or, less often, an ABS module issue.

What I would check first

Don't start by throwing parts at it. First, pull the ABS fault codes with a scan tool that can read chassis codes, not just engine codes. That will usually point you to the exact wheel. Then get the car on a lift and inspect each wheel speed sensor and its harness, especially the front wheels where road debris and steering movement take a toll.

• Scan ABS codes and note whether the fault is left front, right rear, or intermittent.
• Inspect the sensor harness for rubbed insulation, broken clips, or corrosion at the connector.
• Check the tone ring for cracks, rust, or debris packed into the teeth.
• Test sensor signal with a multimeter or scope while spinning the wheel; a dead or erratic reading confirms the fault.
• Verify battery voltage and brake fluid level, since low voltage or fluid can also trigger warning lights.

Is it safe to keep driving?

If only the ABS light is on and the brake pedal feels normal, the car still has conventional braking, but ABS is disabled. That means the wheels can lock under hard braking, especially in rain or on loose surfaces, so I would drive gently, leave extra following distance, and avoid emergency stops. If the brake warning light is also on, the pedal feels soft or strange, or you hear grinding, stop driving and get it checked immediately. A wheel speed sensor fault is usually straightforward to repair, but it should be diagnosed properly rather than guessed at.

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