Dealer.....you could check fuses, but it doesn't sound like a fuse issue, especially if it goes away, then comes back on.
You could also check the brake fluid level....bue either way, the dealer is the way to go IMO.

 

+1 on the dealer. There are just certain things that you shouldn't ask for help on when you are dealing with a brand new car under a full warranty

loman...could it be tied to all of that extra crap you added to your car???

 

This. Especially since you've had the dash apart and the traction control unplugged. Maybe you should re-check your connections and see if it's loose.

 

I am afraid that all I have done will get me in trouble with the dealer. Fog lights and so on. The intake can come off. But the fog lights, Eyeliner lights and LED tail lights and so on.

 

I've never had a new car before, so this isn't applicable. With the new bikes however, I usually leave everything stock at least for 3-5K miles. Then, once I'm sure there are no gremlins present, I start adding accessories and doing other mods like intake/exhaust/ecu, etc. Service becomes are real hassle if you have many mods hooked up with lots of finger pointing happening. After a few thousand miles, everything is broken in, and most electrical faults will make themselves apparent. These new cars are so complex, you never really know what effect some electrical modification might make in the long run.

 

I agree with waiting. my car is just about to roll over to 10K miles

 

FIXED IT!! Turn out is was the LED tail lights. Yes believe it or not it was the tail lights that caused the cruise control to stop working! After a lot of digging online I found where a guy had the same problem from a new corvette and the dealership could not figure it out for several visits and and they finally found it was the LED tail lights he had installed so I tried it and yep its fixed!

 

Just goes to show you how any electrical changes can impact the cars computer and BCM. I have heard of this before.

This is why you have to be VERY CAREFUL when doing any electrical mods to a new car today as you never know how the car will react. In this case, someting as simple as a light bulb caused you to pull your hair out and mess with your cruise.

Happy to hear all is good in the world

 

Sorry to bring up on old thread, but I am having this same issue. My traction control light has been coming on and going of for about 2 weeks now. I haven't had time to take it to the dealer. Suddenly, today on the way to work, my cruise stopped working. When I got to work I turned off the car and restarted it. Everything was back to normal! I have made no electrical mods to my car....yet . What could this problem be??? Any input would help.

Thanks

 

If traction control light is on cruise is automatically disabled. So if I were to turn traction off, I would not have cruise. Most cars are like this. So the good news is you only have one problem instead of two

 

take it to the dealer. 99% sure its the brake switch.

 

Yea I will definitely be taking it to the dealer as soon as possible.

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it is the brake light switch
im sure your car has a stored code of c1516 brake lamp failure.

its an issue for all Kia's and Hyundai's. take it to the dealer its an easy repair or you can go buy one from the dealer they are less then $10 and take about 20 mins to install

 

Its your brake switch.. Your welcome
very quick fix
If you would bring it to my dealer i would have to in and out in 10 mins.. lol

 

and its c1513 brake switch error!!! not c1516

 

Finally got around to getting this fixed. It was c1513 faulty brake lamp switch.
Thanks

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Same thing happen to me yesterday and also noticed cruise would not work. Turning off traction control had no effect on the "stuck" warning light. Once I turned the car off & on it cleared. I'll keep an eye on it an check for codes today.

Note: I was monitoring with my OBD BT module and Torque on my phone when this happened. Torque froze and I had to restart the app.

 

I took it to the dealership and they told me that the traction control for the optima has issues. I bought my car two weeks ago but just a day or two the traction light came on and stayed on. Seems like the LED Lights are the issue but not sure i have to take it back to the dealership and see if they can pinpoint the problem... Sucks if I can't make mods on the car... ?

 

I took it to the dealership and they told me that the traction control for the optima has issues. I bought my car two weeks ago but just a day or two the traction light came on and stayed on. Seems like the LED Lights are the issue but not sure i have to take it back to the dealership and see if they can pinpoint the problem... Sucks if I can't make mods on the car... 

Do you have stock/non-LED tail lights? And if you do, did you replace the incandescent brake lamp bulbs with LEDs?