Hi Cammy,
You're going to have to elaborate on which warning light you mean. I looked around but couldn't locate a warning light that is specifically for the emissions system. The general "check engine" light is where emissions issues are normally shown, but there are a lot more things that can turn it on besides just emissions problems. Here's what that light looks like.
[image|3589384]
The picture comes from RAC Motoring Services website listing Kia warning lights and their meanings.
[link|https://www.rac.co.uk/drive/advice/know-how/kia-warning-lights-what-they-mean-and-what-do-you-need-to-do/|Kia warning lights – what they mean and what to do - RAC Drive]
The only other light they list that seems to even be close to matching the term "emission light" would be the diesel particulate filter warning light. It looks like this.
[image|3589408]
If it isn't one of these, maybe you could take a picture of it and add that to your questions so we can help figure out what the light means and how to fix it.
[guide|21499|Adding images to an existing question - iFixit Repair Guide]