obd11 scanner says p0138, 02 sensor

2005 DODGE CARAVAN

48,000 MILES • 6 CYL • AWD • AUTOMATIC

ROBERT BRAGG

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obd11 scanner says p0138, 02 sensor. how hard to change and where is it?
or is this a false reading that could be something else?

Nov 16, 2008 at 8:42 AM

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SQM

AUTOMOTIVE REPAIR CONTRIBUTOR
6,383 POSTS

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.

Images (Click to enlarge)

Oct 28, 2021 at 7:37 PM