Click Banner for Details on this Saabnet.com Classified
The banner above is an advertisment - if it asks you to download software, please ignore.
Site News - 7/1: Members: Log In to See Fewer Ads! | 5/28: SAAB Evolutions/TSN T-Shirts $14
[General | Members | C900 | 9000 | NG900 & OG93 | 93 | 95 | NG95 | 99 | Sonett | Vintage Models | Clubs | Other Cars | FAQs | Gifts | Member Photo Galleries | Member Directory | Classifieds | Manuals | *Buddy Registry | *Mileage Registry | Polls | What's New | Raffle | Photo of the Month | Sponsors]

9000 Bulletin Board
1985-1998 [Subscribe to Daily Digest]
(Search Author's Posts: e.g. Keyword:username)*Members Only

[Main 9000 Bulletin Board | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Could be the heater circuit on the O2 sensor
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by Bill Homer [Email] (#3427) [Profile/Gallery] (more from Bill Homer) on Sun, 16 Dec 2007 15:09:03 Share Post by Email
In Reply to: Probably not the sensor, Ari [Profile/Gallery] , Sun, 16 Dec 2007 13:35:33
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

Did Autozone give you the exact fault number? There are several failure codes for an O2 sensor, one of which is the heater circuit.

Heater circuits deteriorate over time. To determine if this is what is causing the problem, see if you can measure the resistance over the O2 sensor heater circuit: find the connector plug and measure the resistance between the two same-colored (i.e. both white) wires. On my 1996 Audi, the official spec for this measurement is 0 (really? not likely) to 20 Ohms, I was getting a Check Engine Light (CEL) when the measurement crept up to about 30 Ohms; I replaced the sensor with a new (generic Bosch) part and the reading is now about 3.5 Ohms, no more CEL. I assume that the spec for the SAAB is similar - both cars use Bosch 4-wire sensors.

A heater circuit fault will not render the car undrivable; the heater warms up the O2 sensor so it can read more accurately sooner in the warm-up cycle - you might waste some gas if the car defaults to a richer mixture during the warm-up. Eventually, the hot exhaust gases will provide the necessary heat. A CEL will however render the car undrivable in 30 days if you show up for your biannual Illinois EPA emissions inspection with the light on, causing an automatic failure (I believe that you get 30 days to fix the problem and must return for a retest).

posted by 75.31.246...
Posts in this Thread:
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup
Post a Followup

No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.

Name: Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
E-Mail: (Optional)
Re-Enter E-Mail: (Confidential & Secure - Not revealed to other users!)
Note: Please check your spam folder for BB responses.

Subject:

Posting rules are simple - No for sale/wanted ads may be posted here - use the site classifieds.
You may not cross-post your message to multiple BBs.
Not permitted: political/religious topics and being disrespectful (personal attacks, insults, etc...).
 Site Members do not see any red text, inline ad links, bottom of page anchor ads, box ads, or anti-spam check.

Message: (please no for sale/wanted classifieds - post those in the Saabnet.com Classifieds)
Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).

Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post above, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).
Optional Link: (e.g. http://www.saabnet.com/)
Link Title: (Optional)
Optional Photo/Image Link: (e.g. http://www.saabnet.com/img.jpg)
Photo/Image to Upload: (Please be patient while file uploads)



StateOfNine.com
SaabClub.com
Jak Stoll Performance
M Car Covers
Ad Available

The content on this site may not be republished without permission. Copyright © 1988-2024 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

Random Saabnet.com Member Gallery Photos (Click Image)
This is a moderated bulletin board - Posting is a privilege, not a right. Unsolicited commercial postings are not allowed (no spam). Please, no For Sale or Wanted postings, SERIOUSLY. Classifieds are to be listed in The Saab Network Classifieds pages. This is a problem solving forum for over 250,000 Saab owners, so expect to see problems discussed here even though our cars are generally very reliable. This is not an anything goes type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the Saabnet.com Mission and Purpose Page. Please remember that you are not anonymous. Site Contact | Site Donations | Other Sites by SP - Poverty2Prosperity.org | Run Club Menlo Park | ScreenBot


Site Members do not see red text instructions, bottom of the page anchor ads, or box ads.
Click here to see all the Site Membership Benefits!