The smart key will not work if any of the following occur:
When the smart key does not work correctly, open and close the door with the mechanical key. If you have a problem with the smart key, it is recommended that you contact an authorized HYUNDAI dealer.
If the smart key is in close proximity to your mobile phone, the signal could be blocked by your mobile phones normal operational signals. This is especially important when the phone is active such as making and receiving calls, text messaging, and/or sending/receiving emails. Avoid placing the smart key and your mobile phone in the same pants or jacket pocket and always try to maintain an adequate distance between the two devices.
NOTICE
Keep the smart key away from electromagnetic materials that blocks electromagnetic waves to the key surface.

If the Smart Key is not working properly, try replacing the battery with a new one.
Battery Type: CR2032
To replace the battery:
1. Pry open the rear cover of the smart key.
2. Remove the old battery and insert the new battery. Make sure the battery position is correct.
3. Reinstall the rear cover of the smart key.
If you suspect your smart key might have sustained some damage, or you feel your smart key is not working correctly, it is recommended that you contact an authorized HYUNDAI dealer.
Smart key
Immobilizer systemHyundai Creta GS 2014-2019 Owners Manual: Driver's and passenger's front air
bag
Your vehicle is equipped with a
Supplemental Restraint (Air Bag)
System and lap/shoulder belts at
both the driver and passenger seating
positions.
The indications of the system's presence
are the letters "AIR BAG"
engraved on the air bag pad cover in
the steering wheel ...
Hyundai Creta GS 2014-2019 Service Manual: SRS Control Module (SRSCM)
Description and operation
Description
The primary purpose of the SRSCM (Supplemental Restraints System Control Module)
is to discriminate between an event that warrants restraint system deployment
and an event that does not. The SRSCM must decide whether to deploy the restrain ...