P-110

I have a 1996 Hyundai Sonata GL, 4 cylinder, approx., 107K and is in very good condition. I recently had it inspected and it failed because of Code P110. Going here and there and not finding the right answers, and cost is higher than the last place. I was told that my Idle Control Valve needs to be replaced, only to find that the one everybody pulls up is not on my vehicle and may I remind me that the lowest price is $213.59 from Napa. Help me to solve this problem. I don't know what all P-110 covers and doing a little research online, I found a company called Rock Auto Parts and their parts are very reasonable. If you can help me, I will sing at your next wedding. My car has been good to me and when I purchased it, I found out that it was previously owned by a female in Virginia and I am the second owner. I am very pleased with it.
Frustrated in NC