BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
 
BPM Sport
Post Reply
 
Thread Tools Search this Thread
      03-21-2013, 11:41 PM   #1
Fen335i
Captain
Fen335i's Avatar
25
Rep
803
Posts

 
Drives: e92 M3 / X5d / Z4 M Roadster
Join Date: Jun 2008
Location: Pacific Northwest

iTrader: (0)

error codes - help needed

Hi Guys - I have two error codes being thrown. Anyone know what the solution is to fix the issues?:

1) 274B Lambda sensor pump current assimilation error VKAT bank 2

2) 27B0 Secondary air system throughput bank 1 (2)
Appreciate 0
      03-22-2013, 01:01 AM   #2
Mike Benvo
BimmerPost Supporting Vendor
Mike Benvo's Avatar
United_States
98
Rep
4,804
Posts


 
Drives: Harrop SC M3 / E46 M3 / 7Turbo
Join Date: Apr 2008
Location: SoCal

iTrader: (7)

Garage List
2008 BMW M3  [5.00]
1990 BMW 735i Turbo  [5.00]
2004 BMW M3  [0.00]
Send a message via Skype™ to Mike Benvo
Quote:
Originally Posted by Fen335i View Post
Hi Guys - I have two error codes being thrown. Anyone know what the solution is to fix the issues?:

1) 274B Lambda sensor pump current assimilation error VKAT bank 2

2) 27B0 Secondary air system throughput bank 1 (2)
274B - P2629
Oxygen sensor pump current calibration fault before cat. converter, bank 2
O2 Sensor Pumping Current Trim Circuit/Open (Bank 2 Sensor 1)

Oxygen sensor is available, oxygen sensor voltage > 4951 mV (K_LAVK_OBD_SA_DIAG_OL)

Terminal condition: Engine running - overrun condition

After a defined SA phase the lag period K_LAVK_OBD_SA_T (2.5 sec) must be completed

1. Check plug and wiring harness on pre-cat oxygen sensor LSVK B2 (especially trim circuit wire IA),
2. If OK, replace oxygen sensor

MIL lamp on after engine runs 2x /Small influence on drivability


27B0 - P0491
Secondary air system flow rate, bank 1
Secondary Air Injection System Insufficient Flow (Bank 1)

sls_obdh_mdf_max_intg_norm (after roughly 30s)<K_SLS_OBDH_MDF_MIN_DEF and sls_obdh_lam_asv_intg_norm < k_SLS_OBDH_MDF_2_MAG or sls_obdh_lam_asv_intg_norm < k_SLS_OBDH_ASV_LI_OPE and K_SLS_OBDH_MDF_MIN_DEF>K_SLS_OBDH_MDF_MAX_DEF

Battery voltage > 10.8 V (k_sls_obd_ub_min)

Condition for fault memory entry: 30000 ms

1. Disconnect secondary air line
2. Carry out test routine
3. If flow is too high, replace the ASV
4. Otherwise check Line 1 for obstructions and replace as indicated

My Suggestion:
Replace bank 2 sensor 1 oxygen sensor, clear faults, and see if SES light returns.
__________________

-----| Like us on Facebook | Instagram || Tuning Information | Remote Coding |-----
----Visit us at www.BPMSport.com - Emotion. Driven. | Toll Free: (888) 557-5133----
Appreciate 0
      03-22-2013, 11:20 AM   #3
Fen335i
Captain
Fen335i's Avatar
25
Rep
803
Posts

 
Drives: e92 M3 / X5d / Z4 M Roadster
Join Date: Jun 2008
Location: Pacific Northwest

iTrader: (0)

Thanks Mike, much appreciated! Since I'm a newbie with fault codes, what precat 02 sensor is "bank 2, sensor 1". Is that driver side before the primary cats, or passenger side?

Anyone know of the cheapest place to buy these? Are there "cheap" 02 sensors being sold today that I should stay away from?

Thanks!
Appreciate 0
Post Reply

Bookmarks

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 -5. The time now is 01:07 AM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, 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