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: Fuel Pressure Regulator Repair procedures
Removal
1.
Remove the fuel pump.
(Refer to Fuel Delivery System - "Fuel Pump")
2.
Remove the fuel pressure regulator fixing clip (A).
3.
Remove the fuel pressure regulator (B) from the fuel filter.
Installation
1.
Install in the reverse order of removal. ...
Hyundai Sonata LF 2014-2019 Service Manual: Stop Lamp Switch Repair procedures
Adjustment
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Remove the lower crash pad.
(Refer to Body - "Crash Pad")
3.
Remove the knee airbag.
(Refer to Rstraint - "Air Bag Module")
4.
Confirm the gap between stop lamp switch and bracket.
Stop lamp ...