O2 Sensors - BMW Forum

Cruzin 323is · 04-21-2005, 04:37 PM

what are some symptoms of failing o2 sensors?

Dirty_Tool · 04-21-2005, 07:08 PM

poor fuel economy
loping at idle
decreased performance
Check engine Lamp Illuminated

among others.
DT

Cruzin 323is · 04-21-2005, 08:13 PM

among others, meaning...

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

BUSTaMOVE · 04-21-2005, 09:53 PM

how many o2 sensors are there?

Cruzin 323is · 04-22-2005, 12:00 AM

2.. 1 before the cayt adn 1 after cayt

tomctx · 04-22-2005, 12:29 AM

Quote:

Originally posted by Cruzin 323is@Apr 22 2005, 01:00 AM
2.. 1 before the cayt adn 1 after cayt

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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.

Cruzin 323is · 04-22-2005, 11:13 AM

allright, i'm gunna bring my car in soon! hopefully its a nquick easy fix..

BeachBunny · 04-22-2005, 06:58 PM

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..

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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.

Cruzin 323is · 04-22-2005, 11:09 PM

smogged?

BeachBunny · 04-22-2005, 11:14 PM

Quote:

Originally posted by Cruzin 323is@Apr 22 2005, 08:09 PM
smogged?

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Oooooo my god, dont' tell me you don't have to get your car smogged in ny?!

Cruzin 323is · 04-22-2005, 11:47 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

BeachBunny · 04-23-2005, 12:19 AM

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

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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/

tomctx · 04-23-2005, 12:49 AM

Quote:

Originally posted by Cruzin 323is@Apr 23 2005, 12:09 AM
smogged?

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Emissions test.

Cruzin 323is · 04-23-2005, 01:07 AM

ya... we have them... its called "inspection" in NY
i had my car "inspected in sept... and nothing came up!

BeachBunny · 04-23-2005, 01:26 AM

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!

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Eh, it was worth a shot.

Sorry.