WARNING
NEVER turn the ignition switch to the LOCK or ACC position while the vehicle is in motion except in an emergency. This will result in the engine turning off and loss of power assist for the steering and brake systems. This may lead to loss of directional control and braking function, which could cause an accident.
Before leaving the driver’s seat, always make sure the shift lever is in position, apply the parking brake, and turn ignition switch to the LOCK position. Unexpected vehicle movement may occur if these precautions are not followed.
Hyundai Tucson (NX4) 2022-2023 Owner's Manual: Remote key precautions
The remote key may not work if any of
the following occur:
The key is in the ignition switch.
The maximum operating distance limit
is exceeded (about 32 feet (10 m)).
The remote key battery is weak.
Other vehicles or objects may block
the signals.
The weather is extremely cold.
...
Hyundai Tucson (LM) 2010-2015 Service Manual: Passive Occupant Detection System (PODS) Description and Operation
Description
The system is intended to classify the occupancy status of
the front passenger seat in a motor vehicle based upon the measured
force on the bottom seat cushion.
The system also communicates to the SRSCM whether to allow or
inhibit the deployment of the passenger airbags and/or ...