# Hyundai Santa Fee 2005 O2 Sensor not working. New catalytic converter **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** hyundai, santa-fe\ **Created:** [November 12, 2021, 11:13pm UTC](https://community.cartalk.com/t/hyundai-santa-fee-2005-o2-sensor-not-working-new-catalytic-converter/180638 "2021-11-12T23:13:21Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![zille007](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/zille007/32/26743_2.png) [@zille007](https://community.cartalk.com/u/zille007)\ **Post date:** [November 12, 2021, 11:13pm UTC](https://community.cartalk.com/t/hyundai-santa-fee-2005-o2-sensor-not-working-new-catalytic-converter/180638/1 "2021-11-12T23:13:21Z")
Hyundai Santa Fee 2005 O2 Sensor not working. New catalytic converter and using old sensor. I bought 2 cheap o2 sensor and code came back again. So now new catalytic converter and old o2 sensor but same code. Can you check the video for details and let me know if my o2 sensor working or not. [![](https://global.discourse-cdn.com/cartalk/original/3X/7/9/797f9bfa3209cc8aa8d724e6eb8ab0d78347c453.jpeg "Hyundai Santa Fe 2005 O2 sensor working or not") ](https://www.youtube.com/watch?v=C5GRfnLUK4M) ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [November 13, 2021, 1:59am UTC](https://community.cartalk.com/t/hyundai-santa-fee-2005-o2-sensor-not-working-new-catalytic-converter/180638/2 "2021-11-13T01:59:43Z")
The O2 sensor signals look normal to me. [![](https://global.discourse-cdn.com/cartalk/original/3X/9/2/920c82aae79279b7169d496b337e65aa8eb81476.jpeg "Using upstream and downstream oxygen sensors to test the catalytic converter") ](https://www.youtube.com/watch?v=KGpMzdEO5KY) Tester