O2 sensor replacement procedure needed?

VLADSC50

MEMBER
2008 KIA SORENTO
3.3L
6 CYL
2WD
AUTOMATIC
97,640 MILES

Hi there, I need help with how to take off the bank 2 sensor 2 O2 sensor underneath the car. Also, how can I test the zO2 sensor before I replace it?

Monday, January 13th, 2025 AT 6:25 AM

3 Replies

JACOBANDNICKOLAS

MECHANIC
110,136 POSTS

Hi,

The easiest way to test it is while it is still in the vehicle. Using a live data scan tool, you can watch how it reacts while the engine is running. The voltage should be between 0 and 1.0 mv. If you hit the throttle hard, you should see it react.

Also, take a look through this link for testing. It should help.

https://www.2carpros.com/articles/how-to-check-and-add-transmission-fluid

Here is a link that explains how to replace it:

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

I attached a picture below showing its location. Let me know if this helps or if you have other questions.

Take care,

joe

See pic below.

Image (Click to make bigger)

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Monday, January 13th, 2025 AT 5:51 PM

VLADSC50

MEMBER
42 POSTS

Hi Joe, thank you for the response. I went to take a look at the sensor, but one thing is missing, what do I need to take off to get to it? Do you have a step-by-step procedure from the manufacturer on how to take it off?

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Monday, January 13th, 2025 AT 6:00 PM

KEN L

MASTER CERTIFIED MECHANIC
52,185 POSTS

You can go over this guide:

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

The size is 7/8 so you can clip the wires off and use a deep well socket, I would spray wd40 and let is sit for a few hours. Please upload pictures or videos in your response of any problems so we can see what to help you with.

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Thursday, January 16th, 2025 AT 8:47 AM