Click to go to Forum Home Click to go to maXbimmer Home

Go Back   maXbimmer Forums > maXimum Tech > 5 series
User Name
Password


Welcome to Maxbimmer.com!

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

Reply
 
Thread Tools Rate Thread Display Modes
Old 01-08-2009, 04:55 PM   #1
-shockaz-
Trick paint...
 
Join Date: Mar 2008
Location: toronto
Posts: 13
Send a message via MSN to -shockaz-
1998 528i check engine light p0173

P0173 Fuel trim 2 on my 98 528i, searched around on the internet couldn't find any cases with just one code showing.

its the only code that show on the CEL, i tried to reset the code it came back after 10 mins of driving.

Engine runs fine, no hard starts rough idle. passed Ontario e-test with the light on.


anyone know anything about this? i've read a couple of articles about this but everyone had rough idle and vacum leaks, followed by other codes. Im just getting the one p0173 fuel trim bank 2
-shockaz- is offline   Reply With Quote
Old 01-08-2009, 05:06 PM   #2
-shockaz-
Trick paint...
 
Join Date: Mar 2008
Location: toronto
Posts: 13
Send a message via MSN to -shockaz-
i found some more info..

PO173 is fuel trim malfunction for bank 2 (cylinders 4 to 6).
Depending on the adaptation values (AKA, long term fuel trim or short term fuel trim)
-shockaz- is offline   Reply With Quote
Old 01-22-2009, 05:51 PM   #3
MaxVQ
1st Gear Newbie
 
Join Date: Aug 2007
Location: In my car
Posts: 31
You should get an OBD-2 scanner and see what the fuel trim is.
A large fuel trim (>10) indicates fuel is being added to fix a lean condition
A small fuel trim (<-10) indicates fuel is being removed to fix a rich condition.
MaxVQ is offline   Reply With Quote
Old 01-23-2009, 10:12 PM   #4
-shockaz-
Trick paint...
 
Join Date: Mar 2008
Location: toronto
Posts: 13
Send a message via MSN to -shockaz-
thanx i did.. it was going to 25.. one of the o2 sensors was showing .980 it was stuck at rich.. causing the car to trim to 25
-shockaz- is offline   Reply With Quote
Old 01-24-2009, 12:18 PM   #5
Max_VQ
3rd Gear Member
 
Max_VQ's Avatar
 
Join Date: Aug 2007
Location: down by the river
Posts: 335
Quote:
Originally Posted by -shockaz- View Post
thanx i did.. it was going to 25.. one of the o2 sensors was showing .980 it was stuck at rich.. causing the car to trim to 25
Did you mean your fuel trim is -25?
If your O2 is reading rich, the fuel trim would be negative, as it is removing fuel from the baseline.
Max_VQ is offline   Reply With Quote
Reply

Thread Tools
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 On

Forum Jump


All times are GMT -4. The time now is 03:26 PM.


Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Maxbimmer Copyright 2001 - 2014