The TPMS Malfunction Indicator will illuminate after it blinks for approximately one minute when there is a problem with the Tire Pressure Monitoring System.
Have the system checked by an authorized HYUNDAI dealer as soon as possible.
NOTICE
If there is a malfunction with the TPMS, the Low Tire Pressure Position Telltale will not be displayed even though the vehicle has an under-inflated tire.
NOTICE
The TPMS Malfunction Indicator may illuminate after blinking for one minute if the vehicle is near electric power supply cables or radio transmitters such as police stations, government and public offices, broadcasting stations, military installations, airports, transmitting towers, etc.
Additionally, the TPMS Malfunction Indicator may illuminate if snow chains are used or electronic devices such as computers, chargers, remote starters, navigation, etc. This may interfere with normal operation of the TPMS.
Hyundai Sonata LF 2014-2019 Service Manual: Rear Wheel Speed Sensor Repair procedures
Removal
1.
Raise the vehicle, and make sure it is securely supported.
2.
Remove the wheel cap(A).
Be careful not to damage to the wheel cap(A) when removing the it.
3.
Remove the front wheel and tire (A) from front hub.
Tightening torque:
88.2 ~ 107.8 N.m (9. ...
Hyundai Sonata LF 2014-2019 Service Manual: Injector Description and Operation
Description
The GDI injector is similar to a standard injector, but
sprays fuel at a much higher pressure directly into the combustion
chamber and has a swirl disc to get the fuel swirling as it exits the
nozzle. This aids in atomization of the fuel.
The ECM controls both the feed circuits ...