quote:

Originally posted by Boomer187 I think there is one that runs into your catalytic convertor, and one in your engine block....

Not all cars have 2 O2 sensors, and they're not all in the same location. The stock location of the O2 sensor on my 90 Integra is on the end of the exhaust manifold. On the 92-93 Integra they moved it to the end of the header pipe so it reads from all four cylinders. Some have one or two in the cat convertor and some cats even have air tubes on them. It all varies between cars really.

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quote:

Originally posted by TeKnoHe@d2025 Not all cars have 2 O2 sensors, and they're not all in the same location. The stock location of the O2 sensor on my 90 Integra is on the end of the exhaust manifold. On the 92-93 Integra they moved it to the end of the header pipe so it reads from all four cylinders. Some have one or two in the cat convertor and some cats even have air tubes on them. It all varies between cars really.

you forgot about ho2 sensors. But that's a lesson in itself.

She wanted basic information and the main thing she needs to know is.
A. That she can do it herself.
B. To check the threads and see if it is still ok, and find out why it fell out.
C. Not to touch anything past the threads.
D. Use Anti-Sieze on the threads upon installation.

I would recommend also that when she has her car in for service, they check the upstream o2 sensor to see if it is on it's way out, and if need be replace it. As o2 sensors usually only last 40-60 thousand miles before they start to go bad.


PS, use a o2 sensor from teh factory instead of one from shucks. or any other autoparts store.

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Maynard James Keenan:
Like hearing my grandmother, talk to her dog that way -- "Ooo
-- puppy!" and I said I'd never do that, ever! And now I have two
dogs and I talk like an imbecile! I wander around, "Ooo! You want
food!" I've turned into a f*cking moron.

Three main generic sensors. TP , O2 and post cat O2.

TP is throttle control

O2 is saying what kind of mixture is coming out and the last post cat converter sits there and says how efficient your cat is.

quote:

Originally posted by Orbax Three main generic sensors. TP , O2 and post cat O2. TP is throttle control O2 is saying what kind of mixture is coming out and the last post cat converter sits there and says how efficient your cat is.

while that is true...it is a generalization. depending on what kinda car she has. I know my Oldsmobubble has a TP/o2 sensor together. Of course my olds is a one of kind disaster to repair/no interchangeable nothing/beastly Aurora. So it may just be the only exception...but there could be more. just saying

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1776

95 Nissan Altima. Thanks for all the help guys. The peice was hanging out of the catalytic converter due to rust. I got it welded back in and my axle replaced all for under $120 by the auto yards by my house. They have inexpensive parts and cheap labor. I dont really want to put that much $$ into this car. Just repairing the more necesarry things for the car to function because its old and falling apart.

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uhhh, i wouldn't weld an o2 sensor into the cat. It's gonna have to be replaced sooner or later and now that it's welded in whoever does that job of replacing it will probably have to replace the whole cat now. Did they check with a graphing voltmeter if the o2 sensor was still good?

___________________
Maynard James Keenan:
Like hearing my grandmother, talk to her dog that way -- "Ooo
-- puppy!" and I said I'd never do that, ever! And now I have two
dogs and I talk like an imbecile! I wander around, "Ooo! You want
food!" I've turned into a f*cking moron.