02 Sensors HELP!!! - E46Fanatics E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 02-03-2010, 09:01 AM   #1
BMWQUEEN01
Registered User
 
Join Date: Jun 2009
Location: Atlanta, GA
Posts: 13
My Ride: 01 325i
02 Sensors HELP!!!

My check engine light is on and the codes I'm getting is P0420 Catalyst Sys Efficiency Below Threshold (bank 1) and P1193 Manufacturer specific code. I'm thinking that's due to my 02 sensor going out. Hopefully the sensor hasn't messed up my cat. I went to a mechanic yesterday and he said I needed a new cat, and the computer said it was my 02 sensor.

So I'm here wondering which should I do first and get some prices and what not. I'm calling a few dealers right now but if anyone has any of the parts I need on here that would be great too!!!

Thanks!
BMWQUEEN01 is offline   Reply With Quote
Old 02-03-2010, 11:08 AM   #2
trippmann
Registered User
 
Join Date: Aug 2008
Location: nj monmouth county
Posts: 901
My Ride: E30
Send a message via AIM to trippmann
how many miles are on your car? its very doubtful that its your cats.
__________________
Quote:
Originally Posted by DylloS View Post
I'm surprised along with "making 100k a year, and dating super models" this forum doesn't have "make my girl cum every time" to the list.
Quote:
Originally Posted by Tampa02e46 View Post
^It seriously was the worst decision of my life to sign up for this site.
trippmann is offline   Reply With Quote
Old 02-04-2010, 12:15 AM   #3
e46crooser
Registered User
 
Join Date: Jul 2009
Location: Brentwood, CA
Posts: 63
My Ride: 99 328 5spd
P1193 is the code you should be chasing. From some quick searching its a short term fuel code for bank 2. The cats should be fine (mine have 234k original miles and still pass strict CA smog). This means the DME is compensating for a lean condition. Might want to take the car to a shop that can read the adaptation readings on the vehicle and give you BMW specific fault codes, before you start putting parts on the car that you don't need. Check to see if you have vacuum leaks and take it from there. HTH
e46crooser is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-11-2010, 09:09 AM   #4
BMWQUEEN01
Registered User
 
Join Date: Jun 2009
Location: Atlanta, GA
Posts: 13
My Ride: 01 325i
Quote:
Originally Posted by e46crooser View Post
P1193 is the code you should be chasing. From some quick searching its a short term fuel code for bank 2. The cats should be fine (mine have 234k original miles and still pass strict CA smog). This means the DME is compensating for a lean condition. Might want to take the car to a shop that can read the adaptation readings on the vehicle and give you BMW specific fault codes, before you start putting parts on the car that you don't need. Check to see if you have vacuum leaks and take it from there. HTH
Thanks so much!!! I still haven't gotten this problem fixed I had a fuel pump clog a couple months ago and that's when the sensor came on. But all the mecanics say it's the cats. I will have to find a better computer to read the codes.

I have 167,000 miles on the car.
BMWQUEEN01 is offline   Reply With Quote
Old 07-06-2010, 10:17 PM   #5
fjd330ci
Registered User
 
Join Date: Jun 2005
Location: Hopewell Junction, NY
Posts: 8
My Ride: 2001 330Ci
I recently pulled P1193 (I've seen other posts for P1192 which is the same code for bank 1 the solution in either case is the same). As it turns out the post cat O2 sensors play some roll in adjusting the short term fuel trim values, which over time will affect the long term fuel trim values. Using a live data scan tool I was able to determine that all O2 sensors and MAF were working properly ruling out replacing them, but the long term fuel trim value was peg at the upper limit leaving the DME no further adjustment. After some further searches on this site and others, it seams there is a glich in the DME software, that requires the DME to be reprogrammed. I hope you were able to resolve this issue.
fjd330ci is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Censor is OFF



All times are GMT -5. The time now is 01:43 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
(c) 1999 - VerticalScope Inc. All rights reserved.