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: Shift Cable Repair procedures
Removal
1.
Remove the air cleaner assembly and air duct.
(Refer to Engine Mechnical System - "Air cleaner")
2.
Remove the TCM.
(Refer to Dual Clutch Transmission Control System - "TCM")
3.
Remove the battery and tray.
(Refer to Engine Electrical System - "Battery")
4.
Remove the ...
Hyundai Sonata LF 2014-2019 Service Manual: Intake Manifold Repair procedures
Removal and Installation
1.
Remove the engine cover.
2.
Disconnect the battery negative terminal.
3.
Disconnect the engine wiring connector and haness clamp and disconnect the wiring from intake manifold.
4.
Disconnect the PCV (Positive crankcase ventilation) hose (A) and the PCSV ( ...