The ISG system is to reduce the fuel consumption by automatically shutting down the engine, when the vehicle is at a standstill (i.e. red stop light, stop sign, and traffic jam).
To stop the engine in idle stop mode
The engine is automatically restarted when you release the brake pedal.
Under certain conditions the ISG system will not automatically engage. In this case the ISG light will appear orange on the dash rather than green. Some of these conditions include:
For a full list of conditions please refer to your owner’s manual or look it up online here.
To Deactivate the ISG System
Please note each time you turn on your vehicle it will the ISG system will default to the on position. Depending on your model the location of the ISG OFF button may vary.
If the ISG light is blinking in yellow it indicates a malfunction with the system and you should contact your Hyundai dealer to have it checked out