If the remote key is not working properly, try replacing the battery with a new one.
Battery Type: CR2032
To replace the battery:
1. Pry open the rear cover of the remote key.
2. Remove the old battery and insert the new battery. Make sure the battery position is correct.
3. Reinstall the rear cover of the remote key.
If you suspect your remote key might have sustained some damage, or you feel your remote key is not working correctly contact an authorized HYUNDAI dealer.
Information
An inappropriately disposed battery can be harmful to the environment and human health. Dispose the battery according to your local law(s) and regulation.
Hyundai Sonata LF 2014-2019 Service Manual: Timing Chain Cover Components and Components Location
Components
1. Timing chain cover
...
Hyundai Sonata LF 2014-2019 Owners Manual: Changing a Tire with TPMS
If you have a flat tire, the Low Tire Pressure and Position telltales will come
on. Have the flat tire repaired by an authorized HYUNDAI dealer as soon as possible
or replace the flat tire with the spare tire.
CAUTION
Never use a puncture-repairing agent not approved by HYUNDAI dealer to repair
a ...