European Auto Source
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > 2c7e Lambda probe Error

Thread Tools Search this Thread
      11-07-2011, 10:40 AM   #1
Enlisted Member

Drives: 2008 335i E90
Join Date: Aug 2010
Location: Ocala,FL

iTrader: (2)

2c7e Lambda probe Error

Currently I have a 2008 335i with the following mods:

ets intercooler
ar design catted down pipes
ae cat back exhaust
bms dci

The car seemed to just not be running 100%, so I started to check and see if I could notice an difference while idling and reviing up the engine. I didn't really notice anything at first. But once I quicly revved up the engine to about 4000-5000 rpm I go a lot of white smoke out of the exhaust. I was able to reproduce this several times. I checked the error codes int he computer and the only one listed was:

2c7e Lambda probe behind catalytic converter, trimming control

From what I gather this is related to the Bank 1 o2 sensor after the catalytic converter. I then ran INPA and checked them and Bank 1 o2 sensor does seem to be having issues, but I am not sure what the readings should be. Attached is a picture of the readings I got from IPNA.

The bank 1 after cat o2 shows very low voltage, however when I rev up it does go up, but on idle it stays about 0.00 to 0.07 voltage. Whereas the bank 2 one stays about .6 to .7 voltage.

Does anyone know for sure if that means that the bank 1 o2 sensor is bad and that I need to replace it? Any help or insight would be awesome. Thank you.

Last edited by crasher381; 11-07-2011 at 10:41 AM. Reason: Link broken
Appreciate 0
      07-19-2012, 12:35 PM   #2
bmbob's Avatar

Drives: 2012 E92 M3 DCT "Lime Yellow"
Join Date: Jan 2012
Location: Calgary

iTrader: (0)

Garage List
2011 Audi S4  [0.00]
Did you find any solution to this? I am getting the same code.
Not sure if you replaced bank 1 02 after cat, but if so, did it fix it?
Are you getting bad mileage?
Appreciate 0
      07-19-2012, 11:01 PM   #3
EJ_3's Avatar

Drives: e92 335i, e34 525i & e60 530i
Join Date: Aug 2011
Location: N Las Vegas

iTrader: (13)

Garage List
2007 BMW 335i  [4.17]
1994 BMW 525i  [5.00]
2007 BMW 530i  [4.33]
Make sure you have the correct o2 sensor in the right pipe. The one with the grey wire should be going into the pipe in the passenger side.
Appreciate 0


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Forum Jump

All times are GMT -4. The time now is 10:17 AM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST