This warning light illuminates:
This warning light remains on after blinking for approximately 60 seconds or repeats blinking and off at the intervals of approximately 3 seconds:
When there is a malfunction with the TPMS.
In this case, have your vehicle inspected by an authorized HYUNDAI dealer.
WARNING
Safe Stopping
Hyundai Sonata LF 2014-2019 Service Manual: Main Crash Pad Assembly Components and Components Location
Component Location
1. Main crash pad assembly
...
Hyundai Sonata LF 2014-2019 Service Manual: Compressor oil Repair procedures
Oil Specification
1.
The R-134a system requires synthetic (ND8) compressor oil
whereas the R-12 system requires mineral compressor oil. The two oils
must never be mixed.
2.
Compressor (ND8) oil varies according to compressor model. Be sure to use oil specified for the model of compressor ...