O2 Sensors - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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#1 (permalink) Old 04-21-2005, 04:37 PM
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what are some symptoms of failing o2 sensors?

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#2 (permalink) Old 04-21-2005, 07:08 PM
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poor fuel economy
loping at idle
decreased performance
Check engine Lamp Illuminated

among others.
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#3 (permalink) Old 04-21-2005, 08:13 PM
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among others, meaning...

i mean.. my car runs fun.. and no check engine light.. its just that i get horrible gas mileage

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#4 (permalink) Old 04-21-2005, 09:53 PM
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how many o2 sensors are there?
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#5 (permalink) Old 04-22-2005, 12:00 AM
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2.. 1 before the cayt adn 1 after cayt

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#6 (permalink) Old 04-22-2005, 12:29 AM
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Quote:
Originally posted by Cruzin 323is@Apr 22 2005, 01:00 AM
2.. 1 before the cayt adn 1 after cayt
[snapback]336316[/snapback]

same thing happened to my wife's VW. Ran well, got awful gas mileage. We took it to the dealer since it was under warranty. They replaced the front o2 sensor. Still runs well, and gets great mileage. They said the ECU could have codes and sometimes it doesn't light the "check engine" light. Still can read with a scanner.

1995 325I, window tint, K&N, debaffled airbox, BMW #104 wheels, Nighthawk low beams, smoked side markers, smoked corners, smoked taillights, M3 stlye heated mirrors, various interior bits, Bosal cat-back.
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#7 (permalink) Old 04-22-2005, 11:13 AM
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allright, i'm gunna bring my car in soon! hopefully its a nquick easy fix..

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#8 (permalink) Old 04-22-2005, 06:58 PM
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Quote:
Originally posted by Cruzin 323is@Apr 22 2005, 08:13 AM
allright, i'm gunna bring my car in soon! hopefully its a nquick easy fix..
[snapback]336449[/snapback]
When was the last time you had your car smogged? That's how I knew. I can't remember exactly what it was... but some part of the emissions summary had a pretty high level of unburned gas.
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#9 (permalink) Old 04-22-2005, 11:09 PM
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smogged?

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#10 (permalink) Old 04-22-2005, 11:14 PM
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Quote:
Originally posted by Cruzin 323is@Apr 22 2005, 08:09 PM
smogged?
[snapback]336678[/snapback]
Oooooo my god, dont' tell me you don't have to get your car smogged in ny?!
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#11 (permalink) Old 04-22-2005, 11:47 PM
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why don't u explain what it means.. so i can have a better understanding of what it is... i mean, maybe i have.. maybe i havn't... but i just don't know the termonology smogging

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#12 (permalink) Old 04-23-2005, 12:19 AM
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Quote:
Originally posted by Cruzin 323is@Apr 22 2005, 08:47 PM
why don't u explain what it means.. so i can have a better understanding of what it is... i mean, maybe i have.. maybe i havn't... but i just don't know the termonology smogging
[snapback]336695[/snapback]

Oh, ok. Well, when you take your car in to get it smogged... They put it on a treadmil for cars called a dynamometer, to simulate driving, and then test the levels of certain emissions. If the emissions surpass your state's regulations, you have to fix it so it can pass or you can't register the car...

okay, wow, this is harder to explain that I thought... but I'm sure you know what I mean?! Here are some links...
http://www.smogcheck.ca.gov/stdhome.asp

http://www.smogcheck.ca.gov/stdFolder.asp?...nfo/Factsheets/
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#13 (permalink) Old 04-23-2005, 12:49 AM
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Quote:
Originally posted by Cruzin 323is@Apr 23 2005, 12:09 AM
smogged?
[snapback]336678[/snapback]

Emissions test.

1995 325I, window tint, K&N, debaffled airbox, BMW #104 wheels, Nighthawk low beams, smoked side markers, smoked corners, smoked taillights, M3 stlye heated mirrors, various interior bits, Bosal cat-back.
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#14 (permalink) Old 04-23-2005, 01:07 AM
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ya... we have them... its called "inspection" in NY
i had my car "inspected in sept... and nothing came up!

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#15 (permalink) Old 04-23-2005, 01:26 AM
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Quote:
Originally posted by Cruzin 323is@Apr 22 2005, 10:07 PM
ya... we have them... its called "inspection" in NY
i had my car "inspected in sept... and nothing came up!
[snapback]336728[/snapback]
Eh, it was worth a shot. Sorry.
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