Skoda Superb keyless access not working

Sounds like a dead key battery. I had the same issue with my Superb. Does the spare key work?

Thanks for the quick reply. I should have said I already tried the spare, and it has the same problem. Could both batteries die at the same time?

That's odd about the spare. It's possible both batteries died. I'd still think it's the key fob batteries since the problems started after the warning, and you're getting errors. Get them tested or replaced at a shop. It could be something else, but it sounds like the low battery is the issue.

Just wanted to say you were right. I changed the battery in my key fob, and now everything works. It was 37€ at the shop. Thanks for the help.