Pop the back of key, take circuit board out to plug into VVDI Key Tool Plus.
Remote Program >> Asia >> Hyundai >> All remotes >> Sonata 4f16 >> Generate
Put a battery into the key, and go to car for next step programming.
Connect Xhorse Key Tool Plus with car OBD,
Immo programming >> Asia >> Hyundai >> Select by model >> US market >> Sonata(LFA) >> 2015-2018 >> Remote key adaptation
Put the key in, and turn ignition on.
Turn ignition off.
Press LOCK & UNLOCK together to match remote.
Test the key, it does work.
This is how to use a wired remote & VVDI Key Tool Plus to program 2015 Hyundai Sonata successfully.