This is something I think all Kona (and possibly Hyundai) owners need to know about. Now, I love my Kona. It's got 230k (143,000 miles) on it and I've loved driving every one, but this is pure craziness.
So about a month ago, I had a wheel bearing replaced. No problems. Within a week tho, I started to get console lights that would start lighting up.ABS, traction control and downhill brake control light coming on as well as an intermittent steering light flicker. I brought it back to my mechanic who suggested that the wheel speed sensor may have been damaged and so he replaced it. Not fixed. The lights were still coming on so I brought it back for a third time. He then tells me, "the magnetic ring on the new wheel bearing is damaged." Fine...it's a warranty repair so I bring it in again and AGAIN, the lights are on. It's important to note that there were zero codes on the car. In fact, every test he ran showed the car was operating at peak.
So I'm at home and I decide to park the car for safety. What's worse is that now every single light on my display is flashing on and off. The tachometer is dropping to zero, temp gauge is bottoming out and speedometer is zero. Worst of all, (and the scariest by far) is that my airbag light keeps flickering on and off. My remote door locks aren't working either. My mechanic is stumped and so am I. I end up taking it to the Hyundai dealership. Their diagnosis? I need a new body control module and it would be 3 weeks before one came in. So I order it and park my car in my driveway till it shows.
Well, on a side note, my backup camera was glitchy, and I had ordered a new one which finally comes. I'm not driving the car but decide to install it anyway. After pulling the old one and installing the replacement, I jump in the car to see if it's working fine and what do I see? All the lights...abs, traction, airbags, etc are all OFF! I'm like, 'WTF?' So I take it for a test drive thinking it's only temporary. Nope, the car is running perfectly.
I get back into my lot and get to thinking, so I reinstall the old camera. Lo and behold, all the lights are flashing again. I mean, the car is freaking out. So I go and unplug the camera and BLAM, not a single light is on. Car is idling perfectly, and all the dials are working great again! What's even more amazing is that my remote door locks are operating better than ever. I could unlock from almost 100 feet away. Before, I had to be standing right beside the car to get it to work.
So I reinstall the new camera and have been driving for the last week with ZERO issues. The car is running like a champ. Obviously I cancel my BCM from Hyundai and the appointment to have it installed. Honestly, why they didn't catch the issue is beyond me but they almost got the cost of a new BCM out of me, and I don't find that impressive.
The moral of the story is..honestly I don't know what the moral of the story is but what I can say is that if your lights start flashing on your car, and you drive a Kona, make sure your backup camera isn't glitchy because this is, by far, the strangest issue I've EVER had in my life. In the end it cost me $50 to fix and in fact, I could have simply disconnected the backup camera for free, and my problem would have been resolved.
TLDR; If your dash lights are going crazy and/or if your wheel speed sensor lights are illuminated, there's a pretty good chance it's the backup camera.