O2 Sensors....??

Lannyl81 · 10-05-2021, 09:08 AM

On my '18 that I recently purchased, I just got it up on jack stands to install the Invidia Gemini cat back system; noticed that there are only two O2 sensors, which are post-cats; the pre-cat O2 sensor bung has a bolt in each one.

Is this OEM?..or did the previous owner remove them? I have looked around for open connectors or an end cap...have not found anything yet.

What is going-on here??

Thanks

Rusty · 10-05-2021, 05:55 PM

Should be 4 O2 sensors total. 2 pre cat, 2 post cat. I would check to see if the car has a tune.

Lannyl81 · 10-05-2021, 07:53 PM

Ya know....there are days when I seem to leave my brain in the shower.

Just ignore my original posting above.

Yes there are four O2 sensors....if I had looked a bit higher-up on each cat I would have seen the pre-cat O2 sensors....oh bother!!

What I saw was that each cat pipe has two sensor bung locations....I was seeing the lower one with a bolt in each one.

Oh bother!

Rusty · 10-05-2021, 08:26 PM

Quote:

Originally Posted by Lannyl81

Ya know....there are days when I seem to leave my brain in the shower.

Just ignore my original posting above.

Yes there are four O2 sensors....if I had looked a bit higher-up on each cat I would have seen the pre-cat O2 sensors....oh bother!!

What I saw was that each OEM cat pipe has two sensor bung locations....I was seeing the lower one with a bolt in each one. Perhaps the G37 uses the lower sensor bung....

Oh bother!

Homer moment. D'oh........

10-05-2021, 09:08 AM	#1 (permalink)
Lannyl81 Base Member Join Date: Jun 2021 Location: Tucson Posts: 58 Drives: 2018 370Z Sport M6 Rep Power: 4	O2 Sensors....?? On my '18 that I recently purchased, I just got it up on jack stands to install the Invidia Gemini cat back system; noticed that there are only two O2 sensors, which are post-cats; the pre-cat O2 sensor bung has a bolt in each one. Is this OEM?..or did the previous owner remove them? I have looked around for open connectors or an end cap...have not found anything yet. What is going-on here?? Thanks

10-05-2021, 05:55 PM	#2 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,218 Drives: 2011 Nismo GM 6M Rep Power: 2684438	Should be 4 O2 sensors total. 2 pre cat, 2 post cat. I would check to see if the car has a tune. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

10-05-2021, 07:53 PM	#3 (permalink)
Lannyl81 Base Member Join Date: Jun 2021 Location: Tucson Posts: 58 Drives: 2018 370Z Sport M6 Rep Power: 4	Ya know....there are days when I seem to leave my brain in the shower. Just ignore my original posting above. Yes there are four O2 sensors....if I had looked a bit higher-up on each cat I would have seen the pre-cat O2 sensors....oh bother!! What I saw was that each cat pipe has two sensor bung locations....I was seeing the lower one with a bolt in each one. Oh bother! Rusty, johnxxx and redondoaveb like this. Last edited by Lannyl81; 10-09-2021 at 05:44 PM.

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