Immobilizer Indicator Light (with Smart Key)

This indicator light stays on for up to 30 seconds:
When the vehicle correctly detects the Smart Key inside the vehicle while the ignition switch or Engine Start/Stop button is in the ACC or ON position.
- You can start the engine at this time.
- The indicator turns off after the engine starts.
This indicator flashes for several seconds:
When the Smart Key is not inside the vehicle.
- You cannot start the engine at this time.
This indicator illuminates for 2 seconds and then turns off:
When the vehicle cannot detect the Smart Key inside the vehicle while the ignition switch or Engine Start/Stop button is in the ON position.
In this case, contact an authorized HYUNDAI dealer to have your vehicle inspected.
This indicator flashes:
- When the Smart Key battery is discharged.
- The engine cannot be started at this time. However, you can start the engine by pressing the ignition switch or Engine Start/Stop button with the Smart Key. (For more information, refer to "Starting the Engine" in chapter 5). - When there is a malfunction in the immobilizer system.
In this case, have your vehicle inspected by an authorized HYUNDAI dealer.
Test yourself
A quick Hyundai Sonata LF quiz: every answer comes with an explanation and a link to the manual page.