Where are the O2 sensors located?

EVAPIERCE

MEMBER
1996 ACURA TL
150,000 MILES

Need to know their location s it's a 2.5.
I would love a diagram, please.

Sunday, February 26th, 2023 AT 4:02 AM

4 Replies

BRENDON S

MECHANIC
653 POSTS

Good morning, EVAPIERCE,

I have added a few diagrams for the primary and secondary O2.

Just reply back if you have any more questions.

Thank you,
Brendon

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Sunday, February 26th, 2023 AT 5:28 AM

EVAPIERCE

MEMBER
4 POSTS

Which one is the downstream?

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Sunday, February 26th, 2023 AT 6:50 AM

EVAPIERCE

MEMBER
4 POSTS

On the O2 sensors is the upper sensor the downstream?

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Sunday, February 26th, 2023 AT 6:52 AM

BRENDON S

MECHANIC
653 POSTS

Hello,

Downstream would be the one furthest down the pipe. After the catalytic converter. It is only there to measure whether or not the catalytic converter is performing the way it should be.

The upper is the upstream. So should be one on the manifold this is your upstream. Downstream is after the catalytic converter.

Do you have a trouble code that refers to the downstream O2?

Thank you,
Brendon

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Sunday, February 26th, 2023 AT 2:15 PM