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Cannot Find 02 sensor plug in!! Help!

 
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Old 08-06-2012, 03:12 PM
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Cannot Find 02 sensor plug in!! Help!

Okay so i have had cel for a while knew it was the primary o2 sensor heater. Finally got under there to check the wires just to be sure it was all good and the thing isnt even plugged in. Okay no big deal ill plug it in; well there is no connector.

I know, theres got to be right? Well i spent 3 hours last night looking and looking and looking, looked up wiring diagrams i can tell its on the harness that runs under the intake manifold and should branch off right by the knock sensor... well i can see the knock sensor under there (obviously) and i see where it comes out of the main harness but there is no connector there no wires nothing. Ivew only had the car a few months and this is the only cel its throwing. I am absoltely stumped and dont know what to do. I mean i figured it may be hung up somewhere but i dont see where it could be that i didnt look. I removed my intake (not the actual manifold) and ran my hands on the harness about 5 or six times.

There are two big ass connectors under there that arnt hooked up, one has a cap on it and one is just there but it is like a 12 prong one and would even reach anyway....

Any ideas? Solutions? Am i a dumbass and just cant find it???? Thanks so much for any help.
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Old 08-06-2012, 04:31 PM
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Re: Cannot Find 02 sensor plug in!! Help!


There's a pic for you. Red box is the sensor plug and the connector should be attached to a bracket which is what the blue arrow is pointing at. Hope this helps.
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Old 08-06-2012, 04:45 PM
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Re: Cannot Find 02 sensor plug in!! Help!

Ive seen a similar pic before and looked at other pics but i csnt find the damn thing. Ill jack it up when i get off work and look again. Thanks for posting that.
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Old 08-06-2012, 04:47 PM
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Re: Cannot Find 02 sensor plug in!! Help!

No problem. Just try and look for the bracket and see if it's there.
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Old 08-06-2012, 05:22 PM
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Re: Cannot Find 02 sensor plug in!! Help!

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Originally Posted by 01PreludeBlue View Post
No problem. Just try and look for the bracket and see if it's there.
Yeah thats what ill do instead of looking for an empty connector. Ill report back. Thanks again.
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Old 08-07-2012, 01:21 PM
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Re: Cannot Find 02 sensor plug in!! Help!

No problem you find it yet?
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Old 08-07-2012, 04:24 PM
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Re: Cannot Find 02 sensor plug in!! Help!

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No problem you find it yet?
Spent two hours last night, that clip is chilling out under there but there is no wire even close to it. This is crazy! Total of 5 hours looking im honestly lost as hell. I went over the preludepower and downloaded the ecletrica trouble shooting manual and i see exactly what the connector looks like ect and that damn thing is no where to be found. Im about to take it to a shop and tell them to find it lol.
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Old 08-07-2012, 04:56 PM
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Re: Cannot Find 02 sensor plug in!! Help!

I'd find out where that connector leads to that's missing. Once you find that you could trace it and see if its somewhere stuck or it got cut or removed
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Old 08-07-2012, 06:23 PM
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Re: Cannot Find 02 sensor plug in!! Help!

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Originally Posted by 01PreludeBlue View Post
I'd find out where that connector leads to that's missing. Once you find that you could trace it and see if its somewhere stuck or it got cut or removed
Its the big ass wiring harness that you see that goes right under your intake manifold. Your right the wires very well could be up in there but im not sure how to find that out without removing intake manifold and idk if im up for thta honestly could i run new wires from my ecu? Electrical work is very familiar to me.
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Old 08-08-2012, 12:47 AM
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Re: Cannot Find 02 sensor plug in!! Help!

Hm I don't don't know if you can do that Im not familiar to wiring stuff. Though you could remove your intake stick your hand in there or try and look.
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Old 08-08-2012, 06:21 AM
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Re: Cannot Find 02 sensor plug in!! Help!

I have got same fu**ing problem, i've got cel 1 and 41, and i took my o2 sensor to eletrician, and he todl me, that he's okey, because o2 sensor has 15omh resistance, so the problem is with wires above o2 sensor. So i took car to good electric guy, and he has no wiring diagram for my engine, maybe anyone has? My engine H23A2, help me, please
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Old 09-21-2012, 12:28 PM
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Re: Cannot Find 02 sensor plug in!! Help!

Someone suggested maybe i have an obd1 harness on my car? Or an Sh harness? Not sure but i tried plugging my primary 02 sensor into my secondary plug and reset the ecu and after running for about 5 seconds the cel came back on and its still code 41: primary oxygen sensor heater core malfunction..


Any more ideas guys?

Im getting 26-27 mpg per tank
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