When the ignition switch is placed to the ON position, the ESC indicator light illuminates, then goes off if the ESC system is operating normally.
The ESC indicator light blinks whenever the ESC is operating.
If ESC indicator light stays on, your vehicle may have a malfunction with the ESC system. When this warning light illuminates have your vehicle checked by an authorized HYUNDAI dealer as soon as possible.
The ESC OFF indicator light comes on when the ESC is turned off.
WARNING
When the ESC is blinking, this indicates the ESC is active:
Drive slowly and NEVER attempt to accelerate. NEVER turn the ESC off while the ESC indicator light is blinking or you may lose control of the vehicle resulting in an accident.
NOTICE
Driving with varying tire or wheel sizes may cause the ESC system to malfunction. When replacing tires, make sure they are the same size as your original tires for this vehicle.
Hyundai Sonata LF 2014-2019 Owners Manual: Battery replacement
If the remote key is not working properly, try replacing the battery with a new
one.
Battery Type: CR2032
To replace the battery:
1. Pry open the rear cover of the remote key.
2. Remove the old battery and insert the new battery. Make sure the battery position
is correct.
3. Reinstall the rear co ...
Hyundai Sonata LF 2014-2019 Service Manual: Repair procedures
Service Point Target Auto Calibration (SPTAC)
This procedure provides a way to calibrate the camera by
having the service technician align the car to a well lit simulated
straight road target; preferably wall mounted.
The LDWS camera will have a "System Out of Calibration" DTC set if not op ...