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: Starter Specifications
Specification
ItemSpecificationRated voltage12 V, 0.9 kWThe number of pinion teeth10Performance[No-load, 11.5 V]AmpereMax. 60 ASpeedMin. 5,500 rpm
...
Hyundai Sonata LF 2014-2019 Service Manual: Audio Unit Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the cluster fascia upper panal.
(Refer to Body - "Cluster Fascia Upper Panel")
3.
Remove the audio head unit (A) after loosening the screws.
4.
Remove the audio head unit after disconnecting the connectors and cable ...