The light will flash if you are driving and the traction control system is activated (it detects wheel slip on ice, water, etc.). This just tells you it is actively working. You should adjust your driving to the current road conditions to prevent loss of control.
If it stays on continuously, the traction control system (ESP) is off, or there is a problem with the ESP system. Usually, the ABS light will also illuminate if the ESP light is on due to a fault.
Answers & Comments
Electronic Stabilization Program (ESP)
The light will flash if you are driving and the traction control system is activated (it detects wheel slip on ice, water, etc.). This just tells you it is actively working. You should adjust your driving to the current road conditions to prevent loss of control.
If it stays on continuously, the traction control system (ESP) is off, or there is a problem with the ESP system. Usually, the ABS light will also illuminate if the ESP light is on due to a fault.