I just wanted to give kudos to Sundance and my local dealer for quickly servicing me.
The display on my Optima was reading 104 and the actual temp was 99. I replaced my micron filter...and it didn't help. I then called my dealer at 11:45 and explained my problem. When I got home from work at 3:30, the problem was corrected. Bad temperature sensor.
At any rate, this is a good example of why the dealer makes all the difference. And I did not have to pay any processing fee!!
Cack