Obd11 scanner says P0138, 02 sensor

Hello,

The Code: P0138 - Oxygen sensor voltage high, bank 1 sensor 2.

This code can be triggered due to a bad oxygen sensor, issue with the wiring circuit, faulty PCM.

So yes, this can be a bad oxygen sensor, but it could be something else as well. This oxygen sensor bank 1, sensor 2 is located after the catalytic converter (see diagram below)

https://www.2carpros.com/articles/how-to-test-an-oxygen-sensor-02-sensor
https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

I have attached the trouble shooting steps for this code below.
Follow those steps, as it will help determine the issue.

Please let me know of any questions.
Thank you.