This indicator light illuminates:
In this case, we recommend you to have your vehicle inspected by an authorized HYUNDAI dealer.
Hyundai Sonata LF 2014-2019 Owners Manual: ESC OFF usage
When Driving
The ESC OFF mode should only be used briefly to help free the vehicle if stuck
in snow or mud by temporarily stopping operation of the ESC to maintain wheel torque.
To turn ESC off while driving, press the ESC OFF button while driving on a flat
road surface.
NOTICE
To prevent damage t ...
Hyundai Sonata LF 2014-2019 Service Manual: Components and Components Location
Component Location
1. Auto light sensor2. Head lamps3. Lighting switch (Auto)4. Tail lamps5. BCM (Body Control Module)
...