Hyundai Sonata: 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 Owners Manual: To decrease Cruise Control speed
Push the toggle switch (1) down (SET-) and hold it. Your vehicle will gradually slow down. Release the toggle switch at the speed you want to maintain. Push the toggle switch (1) down (SET-) and release it immediately. The cruising speed will decrease 1.0 mph (1.6 km/h) each time the toggle ...

Hyundai Sonata LF 2014-2019 Service Manual: Oil Pressure Switch Repair procedures
Removal and Installation 1. Remove the under cover. 2. Remove the oil drain plug, and drain the oil into a container. 3. Remove the oil pressure switch (A). Tightening torque : 7.8 ~ 11.7 N.m (0.8 ~ 1.2 kgf.m, 5.7 ~ 8.6 lb-ft) 4. Install in the reverse order of removal. Inspe ...

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