This warning light illuminates:
NOTICE
- Malfunction Indicator Lamp (MIL)
Driving with the Malfunction Indicator Lamp (MIL) on may cause damage to the emission control systems which could affect drivability and/or fuel economy.
NOTICE
If the Malfunction Indicator Lamp (MIL) illuminates, potential catalytic converter damage is possible which could result in loss of engine power.
In this case, have your vehicle inspected by an authorized HYUNDAI dealer.
Hyundai Sonata LF 2014-2019 Service Manual: Components and Components Location
Components
1. Windshield glass 2. Windshield moulding mounting bracket3. Windshield glass side moulding4. Windshield glass upper moulding
...
Hyundai Sonata LF 2014-2019 Owners Manual: Air Cleaner
Filter Replacement
The air cleaner filter can be cleaned for inspection using compressed air. Do
not attempt to wash or to rinse it, as water will damage the filter. If soiled,
the air cleaner filter must be replaced.
1. Remove the air cleaner filter cover.
2. Wipe the inside of the air cleaner. ...