Four problems related to turn signal have been reported for the 2012 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Hyundai Sonata based on all problems reported for the 2012 Sonata.
At night while driving if you use the turn signals all lights go off inside and out. We have taken the car to the dealer and they could not duplicate the issue while there. This is a hazard and can cause a collison at night. This should be addressed by Hyundai. There seems to be too many electrical problems with these cars and it shuld be looked into.
My wiring harness on both the front and back headlights and taillights keeps burning. I have replaced the driver headlight, and all bulbs all around the car. Ive even changed out the connector on the bulb of the headlights and no matter what I do the wire on the wiring harness keeps burning and when I use the turn signal sometimes all the lighting in my car blinks.
In the last few weeks my vehicle has started to have electrical issues related to the steering column. If I turn on my right turn signal, the headlights blink or just turn off. The radio will sometimes turn off as well. If I press any of the volume buttons on the steering wheel for the radio, the car thinks I'm trying to initiate voice commands to call someone. If I try to turn on my high beams, sometimes it works, other times the headlights turn off. All of these things happen whether the vehicle is stationary or moving on any type of road. The vehicle is designed so that if you leave the headlights on, remove the keys, and lock the vehicle, the headlights turn off. It still does this, but the lights will turn on again later and try to kill the battery.
When the headlights are in use, the car randomly loses power, headlights turn off, entire car just shuts down without warning, then after several seconds, powers back on. The lights, engine, everything turns off. Also, when headlights are in use, cruise control and stability do not work. The vehicle is in motion and this has happened on highways and city streets. I have taken my vehicle to the two nearest dealers and they refused to fix the vehicle. Generally, this happens when braking, using turn signals, changing to hi beam/low beam, but has also happened for no reason at all.