This indicator light illuminates :
When you select "ECO" mode as drive mode.
WARNING
Do not watch the ECO indicator light while driving. This will distract you and may cause an accident that results in severe personal injury.
Hyundai Sonata LF 2014-2019 Service Manual: Purge Control Solenoid Valve (PCSV) Repair procedures
Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the PCSV connector.
3.
Measure resistance between the PCSV terminals 1 and 2.
4.
Check that the resistance is within the specification.
Specification: Refer to “Specification”
Removal
1.
Turn the ignition switc ...
Hyundai Sonata LF 2014-2019 Owners Manual: Wheel Replacement & Tire Traction & Tire Maintenance
Wheel Replacement
When replacing the metal wheels for any reason, make sure the new wheels are
equivalent to the original factory units in diameter, rim width and offset.
Tire Traction
Tire traction can be reduced if you drive on worn tires, tires that are improperly
inflated or on slippery road s ...