I know there have been discussions about the Optima steering sticking at the 12 o'clock position.
I have a '13 EX and it started happening 1 year ago at about 13,000 miles..... The 1 time it happened on a trip when I was driving through a snowy slushy conditions and the temp was 28-34 degrees..... it lasted for probably 100 miles and quit when I got into more normal conditions.... and has not happened until just recently (in the last few weeks)
Well it is back and started doing it again, but now I have noticed is it will do it in 30 degree weather and in 40 degree weather..... and it does not seam to be 100% "moisture" related, or speed related.
I have an appt at the dealer tomorrow (1/27/16) and of course they have never heard about the problem before.
I am hoping that someone has some knowledge about the problem..... that I can pass on to the service advisor.