missing o2 sensor

[MooreEk]

Hey everyone, I’ve been getting this code since I bought my 98 EK hatch with an aftermarket exhaust but I’m not sure if this is affecting this deal but just throwing that in. But the code is p0141 witch is bank 1 sensor 2 and I have looked under the car and still can’t find this damn thing.
Here is some pictures showing the upstream sensor but can’t find the downstream witch is what I need. I need better gas mileage, thanks!

 

[MooreEk]

Your engine (D16Y7?) does not have a stock header-cat.

What other mods are found in the engine bay?

D16Y8, all stock from what I can see, the manifold looks aftermarket tho...but other than that I can see other mods


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[MooreEk]

The stock D16Y8 secondary O2 sensor inserts into the cat. Look there.

Sorry new to this but where is the cat?


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[MooreEk]

The cat for the Y8 of 99-00 Civics is located after exhaust pipe A.

My car is a 98 though


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[MooreEk]

Haha...why assume that a 99-00 EX exhaust can’t be swapped into you hatch?

Right ok, I will take a look. Is the engine stock to this car or is it also swapped?


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[MooreEk]

Right, I did some research and a little bit of stalking. I saw a schematic that you posted in another thread and I saw 2 sensors. One before the cat and one on the cat to the passenger side. I just looked under the car and I still could not find either of them. I know it’s night and all but I still should have been able to see it. You said that it’s from an ez but idk.


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