Sky InsuranceVolks Autos
Results 1 to 14 of 14
Like Tree1Likes
  • 1 Post By olly quattro

Thread: Too rich and too lean! Ahhhhh

  1. #1
    bowen's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Mar 2011
    Posts
    456

    Too rich and too lean! Ahhhhh

    Hi guys,

    Recently had some running problems with my a4 b6 cab, BFB engine code. I was getting 3 codes; running rich,running lean and high rpm at idle. With a bit of research it led me to the crankcase breather valve. I replaced this and a good job I did as the old one was shafted. Now I have replace it with a genuine part I have just got CEL 17545 and 17536 running rich and lean?! How!? It had a new maf around a month ago.

    Any help would be great, thanks.

  2. # ADS
    ADS
    Join Date
    Always
    Posts
    Many
     
  3. #2
    marktdisport's Avatar
    5th Gear

    Status
    Offline
    Join Date
    Jul 2011
    Location
    mids
    Posts
    1,193
    would a lambda sensor cause your faults bowen ... just a guess !!!!
    A4 TDI 130 SPORT..
    now sold but still in the family, gone back in time to the cupra R again..

  4. #3
    bowen's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Mar 2011
    Posts
    456
    I've looked at Ross tech, it does suggest lambda sensor, maf or vac/boost leak? Im getting it smoke tested next week, that should eliminate the leak, hopefully.

  5. #4
    1st Gear

    Status
    Offline
    Join Date
    Sep 2010
    Posts
    167
    I would be looking at all the rubber hoses around the throttle valve carefully for any splits, deterioration, holes etc..... Especially between the air mass meter and the throttle valve. An air leak could cause a high idle and mixture trim faults.

  6. #5
    bowen's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Mar 2011
    Posts
    456
    i hope the smoke test shows up an air leak!

    will let you know.

  7. #6
    bowen's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Mar 2011
    Posts
    456
    Does any one have an etka for the diverter valve location?

  8. #7
    Neutral

    Status
    Offline
    Join Date
    Sep 2011
    Posts
    69
    diverter valve is down the bottom of the engine bay accessed from under the car, Number 14

    bowen likes this.

  9. #8
    bowen's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Mar 2011
    Posts
    456
    found it, cheers mate!

  10. #9
    bowen's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Mar 2011
    Posts
    456
    Ok, so i had no leaks from the smoke test. I still get 17545 and 17536.

    Also to note, my temp gauge works intermittently? would this cause these codes, it has had a new temp sensor last mont though?

  11. #10
    quattrojames's Avatar
    Moderator

    Status
    Offline
    Join Date
    Mar 2008
    Location
    Dorset
    Posts
    13,708

    My Social Networking

    Follow quattrojames On Twitter Add quattrojames on Facebook
    What *exactly* does the Ross-Tech wiki list those codes as?
    Ingolstance Read about my A6 HERE.

  12. #11
    bowen's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Mar 2011
    Posts
    456
    17545/P1137/004407 - Fuel Trim: Bank 1 (Add): System too Rich

    Possible Symptoms

    • Malfunction Indicator Light (MIL) active
    Possible Causes

    • Mass Air Flow (MAF) Sensor faulty
    • Fuel Pressure Regulator faulty
    • Fuel Injector(s) faulty
    • Oxygen Sensor Control faulty
      • Oxygen Sensor(s) faulty
    • Evaporative Emission (EVAP) System faulty
    Possible Solutions

    • Check Mass Air Flow (MAF) Sensor
    • Check Fuel Pressure Regulator
    • Check Fuel Injector(s)
    • Check Oxygen Sensor Control
      • Check Oxygen Sensor(s)
    • Check Evaporative Emission (EVAP) System

  13. #12
    bowen's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Mar 2011
    Posts
    456
    17536/P1128/004392 - Fuel Trim; Bank 1 (Mult): System too Lean

    Possible Symptoms

    • Malfunction Indicator Light (MIL) active
    Possible Causes

    • Mass Air Flow (MAF) Sensor faulty
    • Oxygen Sensor Control faulty
      • Oxygen Sensor(s) faulty
    • Fuel Injector(s) faulty
    Possible Solutions

    • Check Mass Air Flow (MAF) Sensor
    • Check Oxygen Sensor Control
      • Check Oxygen Sensor(s)
    • Check Fuel Injector(s)

  14. #13
    bowen's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Mar 2011
    Posts
    456
    My next point of call is Lambda sensor/s

  15. #14
    Reverse Gear

    Status
    Offline
    Join Date
    Sep 2012
    Posts
    10
    Hi! I have almost the same problem
    My car is a A4 2.0 liter engine, ALT sedan 2001
    There is two recurring error in Engine. I also linked what suggest ross-tech wiki

    16804/P0420/001056 - Catalyst System; Bank 1: Efficiency Below Threshold

    Possible Causes
    • Leakage in Intake and/or Exhaust System
    • Catalyst faulty
    • Oxygen Sensor(s) faulty
    • Oxygen Sensor(s) Control faulty
    Possible Solutions
    • Check Intake and Exhaust System for Leaks
    • Check Catalyst
    • Check Oxygen Sensor(s)
    • Check Oxygen Sensor(s) Control
      • Perform Oxygen Sensor(s) Aging Check

    17544/P1136/004406 - Fuel Trim: Bank 1 (Add): System too Lean


    Possible Solutions
    • Check Mass Air Flow (MAF) Sensor
    • Check Fuel Pressure Regulator
    • Check Fuel Pump
    • Check Intake/Exhaust System for Leaks
    • Check Secondary Air Injection for Leaks
    • Check Vacuum Lines for Leaks
    I have checked both O2 (lambda) sensor's heater resistance.
    Attachment 10383Attachment 10384


    G130 (4 pin connector) lambda probe's resistance between 2 and 1 pin was 8 Ohm around ~ 5°C I think this is OK
    G39 (6 pin connector) lambda probe's resistance between 4 and 3 pin was 2,7 Ohm around ~ 5°C Is this resitance OK?
    G39 had a cap, I took off and take measured. I find it is the 6 and 2 pin was 107,9 Ohm around ~ 5°C

    Attachment 10387

    Measuring Block 006 field 4 Lambda was -3,1%

    Last week was -4,7%

    Attachment 10386

    I also find a manual. O2_Sensor_Testng_DIY V2.pdf
    Attachment 10380

    In field 2 I had a readout of ~1,5 V, wich is out of spec 0 V - 1 V. What is wrong?
    Attachment 10381
    Attachment 10382

    That's it until now.
    Any thoughts?

 

 

Similar Threads

  1. Rich under load, lean at idle ?
    By ben4866 in forum A3/S3 Forum (8L Chassis)
    Replies: 13
    Last Post: 9th November 2009, 09:07
  2. Alloys - A6 Avant 1999 oh no/yes ahhhhh!
    By Audime in forum A6/S6/Allroad forum (C5 Chassis)
    Replies: 2
    Last Post: 12th July 2009, 18:35
  3. Airbag Light ahhhhh
    By S3mad in forum A3/S3 Forum (8L Chassis)
    Replies: 8
    Last Post: 2nd September 2008, 17:21
  4. RATTLES...ahhhhh
    By terrysingh in forum A4/A4 cabriolet/S4 forum(B6 chassis)
    Replies: 1
    Last Post: 6th June 2007, 18:48
  5. Running Rich or Lean???
    By Rallyman in forum VCDS (formerly VAG-COM) forum
    Replies: 3
    Last Post: 13th February 2006, 08:34

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO