Hyundai Sonata: Convenient features of your vehicle / Door locks

Immobilizer System

The immobilizer system protects your vehicle from theft. If an improperly coded key (or other device) is used, the engine's fuel system is disabled. When the ignition switch is placed in the ON posit ...

Operating Door Locks from Outside the Vehicle

Mechanical key If you lock the driver's door with a mechanical key, all vehicle doors will lock. If you unlock the driver's door with a mechanical key, the driver's door will unlock. Once the doors ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Repair procedures
Diagnosis with GDS 1. BSD system defects can be quickly diagnosed with the GDS. GDS operates actuator quickly to monitor, input/output value and self diagnosis. 2. Connect the cable of GDS to the data link connector in driver side crash pad lower panel, turn the power on GDS. 3. Sele ...

Hyundai Sonata LF 2014-2019 Owners Manual: Charging System Warning Light
If this warning light comes on while the engine is running, the battery is not being charged. Immediately turn off all electrical accessories. Try not to use electrically operated controls, such as the power windows. Keep the engine running; starting the engine will quickly discharge the battery ...