What is the reason for the constant yellow ABS light on the car's dashboard?

[Russell]

The reason for the constant yellow ABS light on the car's dashboard: This indicates a fault in the ABS system, which requires immediate repair. The ABS system is the Anti-lock Braking System in a car. This system prevents the wheels from locking up during emergency braking. If the wheels lock up during emergency braking, the car may skid uncontrollably, making it impossible for the driver to control the trajectory or slow down, which is very dangerous. The ABS system allows the wheels to maintain a state of rolling and sliding during emergency braking, enabling the driver to slow down the vehicle while still controlling its trajectory. This allows the driver to both decelerate and avoid obstacles. When the ABS system is active, the ABS indicator light on the dashboard will flash. If there is a fault in the ABS system, the ABS indicator light on the dashboard will remain constantly lit.