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O2 sensor in exhaust?

karag

By karag,
in General Maintenance

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karag Enthusiast

karag

Posted
Posted

Just a quick question, my RWC mechanic mentioned something to me about when the compliance joint put the new exhaust on, they didn't put back (or even drill a hole for) an oxygen sensor..

Now I know I'm new to this but I was under the impression the airflow sensor was in the intercooler/intake piping?

Does anyone know if I'm wrong or what he is talking about?

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https://www.sau.com.au/forums/topic/57553-o2-sensor-in-exhaust/
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  • 2 weeks later...
someonestolecc Grand Master

someonestolecc

Posted
Posted

karag I'd like to know what is up also.

I have a sensor on my dumppipe hangin off the turbo and also one undearneath the car that's meant to go into the exhaust somewhere. This is not hooked up .. it was just hangin off the bottom of the car (I've tucked it up and away now).

Still not sure what the ramifications of it are :rolleyes: let us know how you go.

The Dan Grand Master

The Dan

Posted
Posted

OK, the sensor in the dump pipe just behind the turbo is your O2 sensor. The one down further is supposed to go into your Catalytic converter. It is an exhaust heat sensor and IS NOT required for roadworthy. If you look on your dash there is a light that looks like a cat converter with three little steam looking things coming off it. That's the light for it.

It senses when the catalytic converter becomes too hot IE. Blockage or running extremely rich and the light comes on. Pretty basic. If you are worried about it. all you gotta do is go to a bolt place and get a nut that will suit the thread on the sensor. All you gotta do then is take the nut into your local Exhaust shop and tell them you want the sensor welded back in. They just have to drill an equivalent hole (as close to the back of the cat as possible) and weld the nut into place. Easy as.

Just make sure he is careful while welding as he may distort the nut and you won't be able to screw in the sensor.

They should only charge about $30 or something similar.

It will take no longer than half an hour so don't let them sting you for it.

It won't be your o2 sensor I don't think because for compliance they change the catalytic converter and it is too hard to weld the nut and crap like that. They just want it cheap and quick, so they leave them out. Hondas have the same setup.

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