This warning light illuminates:
In this case, have your vehicle inspected by an authorized HYUNDAI dealer.
Information - Electronic Parking Brake (EPB) Warning Light
The Electronic Parking Brake (EPB) Warning Light may illuminate when the Electronic Stability control (ESC) Indicator Light comes on to indicates that the ESC is not working properly (This does not indicate malfunction of the EPB).
Hyundai Sonata LF 2014-2019 Service Manual: Seat Belt Pretensioner (BPT) Description and Operation
Description
The Seat Belt Pretensioners (BPT) are installed inside Center
Pillar (LH & RH). When a vehicle crashes with a certain degree of
frontal impact, the pretensioner seat belt helps to reduce the severity
of injury to the front seat occupants by retracting the seat belt
webbing ...
Hyundai Sonata LF 2014-2019 Service Manual: Specifications
Specifications
ItemSpecificationMaster cylinderTypeSingleI.D. mm(in)NON EPB ?22.22mmEPB?23.81mmPiston stroke mm(in)45±1mm(1.77±0.039in)Fluid level sensorProvidedBrake booster?Type11" SingleBoosting ratio9:01Front disc brakeTypeVentilated discDisc O.DGAMMA1.6 T-GDI305mm (12.0078 in)THETA2 ...