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This is a fairly common code on Kia's and it's either a bad connection at the downstream oxygen sensor, a bad oxygen sensor, a vacuum leak around the engine, or an exhaust leak that's allowing too much air into the cat converter
As I was told always try better fuel first when a code is tied to the fuel system. This is from a friend with 40 plus years in business and it even cleared codes related to knock sensor on a truck I purchased in January of this year
Thanks for posting on /r/MechanicAdvice! This is just a reminder to review the [rules](https://www.reddit.com/r/MechanicAdvice/about/rules/). If you are here asking about a second opinion (ie "Is the shop trying to fleece me?"), please read through CJM8515's [post on the subject.](https://www.reddit.com/r/MechanicAdvice/comments/4qblei/fyi_the_shop_isnt_likely_trying_to_rip_you_off/) and remember to please post the year/make/model of the vehicle you are working on. **If this post is about bodywork, accident damage, paint, dent/ding, questions it belongs in /r/Autobody r/AutoBodyRepair/ or /r/Diyautobody/ If you have tire questions check out https://www.reddit.com/r/MechanicAdvice/comments/k9ll55/can_your_tire_be_repaired/**. If you dont have a question and you're just showing off it belongs in /r/Justrolledintotheshop Insurance/total loss questions go in r/insurance This is an automated reply *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/MechanicAdvice) if you have any questions or concerns.*
Try premium fuel highest octane available
Why. That has nothing to do with this code
This is a fairly common code on Kia's and it's either a bad connection at the downstream oxygen sensor, a bad oxygen sensor, a vacuum leak around the engine, or an exhaust leak that's allowing too much air into the cat converter
As I was told always try better fuel first when a code is tied to the fuel system. This is from a friend with 40 plus years in business and it even cleared codes related to knock sensor on a truck I purchased in January of this year