Hi, I have an Ioniq EV "Elite" early 2019 model, blue color.
I have done about 8,500 km so far, and have not had any issues until a few days ago.
I am telling this is great detail to help anyone else who may have the same issue. In my case it was a lack of knowledge about the car and then misreading the manual. OK, I am a complete idiot, and should have known better.
I mostly charge my car at home using the "trickle" charger, which in my case is 10 Amp x 240 V which is around 2.4 kw/hour. When I went to remove the charger one morning, ( normally, unlock button on remote, and remove charger cable ) nothing happened. I tried locking the car and unlocking --- with no luck. The Charger was not going to disconnect.
I was out of time, so I locked the car and drove my ICE van to work.
The next day I had some time to try and get it unstuck, and tried various methods mentioned by others on this forum, and elsewhere but none of these ideas helped. I carefully read the manual, and tried to find the emergency disconnect cable mentioned in posts and online. It seemed to indicate that it was near the 12v Battery in the bonnet, but I was unable to locate it.
I rang the roadside assist (This service came with the care ) and about an hour later, and NRMA van pulled up. ( NRMA is the widest used service for roadside assist in NSW, Australia where I live and Hyundai had some arrangement with them ) The roadside assist guy had never seen an ioniq before, and did not look like he had any training at all (I am not surprised by this), and bothof us tried to find the emergency release. He checked the 12 v battery and said it was low, it was 11.4 v .... ummmmmm.
He left, suggesting that I might have to get a tow to Hyundai. I tried to ring support at the dealer by because it was the weekend, nobody in their support section was around.
I turned to the manual again, and discovered that there were several places where the emergency release cable might be, depending on model etc . After some exploration, I looked for one in the middle of the boot under the mat, and almost gave up ( The diagram in the manual was not clear ) when I pulled up more of the panels under the mat and found the emergency release.
I pulled it a little more than"slightly" I think the manual said, and IT WORKED!!! Yeah!
I now have the cable out, but the car wont let me go anywhere as the battery was flat. I got all sorts of false warnings and the electronics was obviously in a bad state. I assumed the flat battery was the issue here and looked to the manual which said that plugging the cable back in and charging for 10 hours will fix a flat battery, which is what I did. This worked, and the car is working fine again.
I am a software engineer, and I would speculate that the original charger cable lockup could possibly be a software issue. I vaguely remember the buttons on the remote must have activated in my pocket, I could hear the lock/unlock cycle a few times when i was walking up to the car. This may have put the car is an unexpected state, and somehow stopped it unlocking the charger, thus only the emergency cable could release it.
Because I left the car for a day with the charger plugged in ( and disconnected from the domestic supply ) this ran the battery down and left me with both a stuck charger cable and an almost flat 12v battery.
Anyway, I how this helps someone who gets into the same situation.