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: Crash Pad Garnish Assembly [RH] Repair procedures
Replacement
•
When prying with a flat-tip screwdriver or use a prying trim
tool, wrap it with protective tape, and apply protective tape around the
related parts, to prevent damage.
•
Use a plastic panel removal tool to remove interior trim pieces to protect ...
Hyundai Sonata LF 2014-2019 Owners Manual: To Adjust the Sensitivity of Smart Cruise Control
The sensitivity of vehicle speed when following the front vehicle to maintain
the set distance can be adjusted. Go to the User Settings Mode (Driving Assist)
and select SCC (Smart Cruise Control). You may select one of the three stages you
prefer.
• Slow:
Vehicle speed following the front vehi ...