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: Cooling Fan Repair procedures
Removal and Installation Cooling Fan Assembly 1. Disconnect the battery terminals. 2. Remove the under cover. (Refer to Engine And Transaxle Assembly - "Engine Room Under Cover") 3. Disconnect the air duct(A). 4. Disconnect the coolingfan connector(A). 5. Disconnect the vacuum ...

Hyundai Sonata LF 2014-2019 Owners Manual: Theft-alarm system
This system helps to protect your vehicle and valuables. The horn will sound and the hazard warning lights will blink continuously if any of the following occurs: - A door is opened without using the remote key or smart key. - The trunk is opened without using the remote key or smart key. - The eng ...