Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > X Series > X5 E53 (1999 - 2006)

X5 E53 (1999 - 2006)
The X5 SAV Forum

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #1  
Old 03-29-2013, 01:03 PM
raider03 raider03 is offline
Registered User
Location: l.a.
 
Join Date: Mar 2013
Posts: 22
Mein Auto: 2001 BMW X5 3.0I
Lightbulb 2001 BMW X5 3.0i running lean!

Hello everyone new to the forum... Few weeks ago bought a 2001 BMW X5 3.0i w/ 108K miles on it. Love the car, but it started throwing P0171 & P0174 codes and they are giving me quite a headache. First thing that came to mind was dirty/bad MAF so I cleaned it out and reset the codes. Went with 2 days without SEL and came back on. I didn't really had any symptoms before or didn't notice any... Now I do feel a small rough idle.

I've visually checked for cracks and also sprayed brake cleaner and can't find any leaks on major intake hoses. I also took out the dreaded DISA valve and looks just fine to me. I have a scanner and was looking at my O2 voltages and all 4 sensors are at .03-.04 is this normal below the 0.1volts?? I knw it means system is lean but all O2 sensors including downstream? Thinking it might be the Front O2's .

Another weird thing I noticed, I unplugged the MAF while car is running and engine didn't turn off and I looked at my front O2 voltages and they went up to .4 - .8 instantaneously , if I plug the MAF back in engine shuts off. So I thought it was a bad MAF and went to dealer where I bought the car and they switched it with another X5 they had in the lot and I took readings and the issue is still there.

Would appreciate some guidance. Thanks.
Reply With Quote
Advertisement
 

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > X Series > X5 E53 (1999 - 2006)
Today's Posts Search
Thread Tools
Display Modes

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 -7. The time now is 06:15 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms