What does it mean when the ABS light on the vehicle dashboard is on?

[LeWillow]

The ABS light on the vehicle dashboard being illuminated indicates a fault in the ABS system, alerting the driver to exercise caution while driving and necessitating prompt inspection and repair. Possible reasons for the ABS light being on include the ABS speed sensor's sensing part being covered, or poor signal quality caused by loose connections between system wiring or poor contact in the ABS relay, leading to system malfunction. If the ABS speed sensor's sensing part is covered by dirt, mud, or other contaminants, it can interfere with the sensor's ability to detect the corresponding speed signal. This prevents the ABS computer from determining the vehicle's speed or calculating the wheel slip rate, thereby hindering its ability to issue appropriate commands to adjust braking. The solution is to clean the dirt from the speed sensor and adjust the gap between the speed sensor and the signal ring to restore normal function. Poor signal quality caused by loose connections between system wiring or poor contact in the ABS relay can also lead to system malfunction. The most common issue is a loose speed sensor wire connection, which will also be recorded in the ABS computer's fault memory as a poor speed sensor signal. The solution is to inspect the wiring connections and re-secure any loose connections.