Hyundai Sonata: Smart Key / Loss of a smart key

Hyundai Sonata LF 2014-2019 Owners Manual / Convenient features of your vehicle / Accessing your vehicle / Smart Key / Loss of a smart key

A maximum of two Smart Keys can be registered to a single vehicle. If you happen to lose your smart key, you should immediately take the vehicle and remaining keys to your authorized HYUNDAI dealer or tow the vehicle, if necessary.

Mechanical key

If the Smart Key does not operate normally, you can lock or unlock the door by using the mechanical key. Press and hold the release button (1) and remove the mechanical key (2). Insert the mechanic ...

Smart key precautions

The smart key will not work if any of the following occur: The smart key is close to a radio transmitter such as a radio station or an airport which can interfere with normal operation of the tran ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Boost Pressure Sensor (BPS) Repair procedures
Inspection 1. Connect a GDS on the Data Link Connector (DLC). 2. Measure the output voltage of the BPS at idle and IG ON. Specification: Refer to "Specification" Removal 1. Turn the ignition switch OFF and disconnect the battery negative (-) cable. 2. Disconnect the boost pre ...

Hyundai Sonata LF 2014-2019 Service Manual: Seat Heater Switch Schematic Diagrams
Circuit Diagram ...