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Where does this O2 plug go?

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Old 08-26-05, 03:15 PM
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Where does this O2 plug go?

I was removing my header and failed to seperate the male/female terminal to my O2 sensor. As a result it pulled out from god knows where. Any ideas of where I plug it back in to?
Attached Thumbnails Where does this O2 plug go?-o2plug.jpg  
Old 08-26-05, 03:38 PM
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LOL, the ECU.

Along the harness, I believe it is wired in with the BAC, not sure on a N/A though.
Old 08-26-05, 03:42 PM
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So it goes inside of the car?
Old 08-26-05, 03:49 PM
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The yellow end of the o2 sensor connector had its wire broken off. Like it was said above look where the BAC connector wires split off from the main harness right around the tstat neck/housing.
Old 08-26-05, 03:51 PM
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The dangling part almost looks like the 'core' of an O2 sensor. If this is the connector end, it sure doesn't look like mine (S5 NA)!

Last edited by johnnyg; 08-26-05 at 03:55 PM.
Old 08-26-05, 04:04 PM
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Yea s5's are different. S5 have this weird black ovalish connector while s4's have the o2 sensor that looks like the knock sensor connector.
Old 08-26-05, 04:13 PM
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OK, I just searched that main wiring harness behind the thermostat, and I seen nothing irregular. So that white portion which appears to be broken off, sticks out on the main harness in that area? Can I just run a wire straight to the ECU?
Old 08-26-05, 04:40 PM
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Yea you can run a wire straight to the ecu.
Old 08-26-05, 05:25 PM
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it's a grey sheathed wire coming from around the T-Stat housing....
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