What Causes the Electronic Stability System Fault Light to Illuminate?

[SanEloise]

Electronic stability system fault light illumination is generally caused by signal loss from components of the vehicle stability system, commonly due to failures in the steering angle sensor, lateral acceleration sensor, or wheel speed sensor. This indicator light displays the operational status of the electronic vehicle stability system and is typically yellow in color. Below is an introduction to the vehicle stability system: Function: The Electronic Stability Program (ESP) is an anti-skid device that can control both drive wheels and driven wheels, incorporating ABS (Anti-lock Braking System) and ASR (Anti-Slip Regulation). Principle: The ESP system is essentially a traction control system. Compared to other traction control systems, ESP not only controls the drive wheels but also the driven wheels. For example, in cases of oversteer commonly seen in rear-wheel-drive vehicles where the rear wheels lose control and cause the car to fishtail, ESP will apply braking to the outer front wheel to stabilize the vehicle. In cases of understeer, to correct the tracking direction, ESP will apply braking to the inner rear wheel, thereby adjusting the driving direction.