What is the fault when the ESP light is on in an Audi A6?

[StRose]

Audi A6 ESP light on indicates a fault in the Electronic Stability Program system. The ESP system is a general term for systems or programs designed to enhance vehicle handling performance while effectively preventing loss of control when the vehicle reaches its dynamic limits. Whenever the ESP system detects a discrepancy between the driver's input and the actual movement of the vehicle, it immediately stabilizes the vehicle through selective braking or engine intervention. The Audi A6 is a mid-to-large-sized car under FAW-Volkswagen Audi. Taking the 2004 Audi A6 2.8L Technology Leader as an example, its dimensions are 4886mm in length, 1810mm in width, and 1475mm in height, with a wheelbase of 2850mm. The body adopts a 4-door, 5-seat sedan structure, with a fuel tank capacity of 70 liters, a curb weight of 1560kg, and a trunk capacity of 487 liters.