Hope this helps! I've learned it from the Yoda community and this is NOT my first check engine light! So, I received a code 26 or 26. Went on the interwebs and found a ball park answer.

My fuel and air ratio has been off. I could tell my GPMs was declining by about 30 miles per half tank. I was getting 110ish when I used to be getting at least 150ish.

ALSO, because I might be a little toooooo IN LOVE with this iron pig...I could smell she wasn't burning right before the check engine light came on! And when I left her (Zoe) in idle she was kinda of buzzing I guess. The idle just went up and down and hopping slightly. So, I knew something was up!

Ordered some OEM Oxygen Sensors and will see how it turns out. (8946560110) Toyota part number.

Thanks for tuning in!

ALSO follow up video will be coming for actually SOLVING the issue if this is what it is! Have never changed an o2 sensor before.