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Thread: Hey Jack? I Just Got A P0431 Warm Up Catalyst; Bank 2: Efficiency Below Threshold

  1. #1
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    Hey Jack? I Just Got A P0431 Warm Up Catalyst; Bank 2: Efficiency Below Threshold

    Going to work this morning and I got a check engine light. Just checked it with VCDS and the only fault found was this one below.

    16815 - Warm Up Catalyst; Bank 2: Efficiency Below Threshold
    P0431 - 001 - Upper Limit Exceeded

    Before I screw myself over again I thought I would run this past the members here on what I should check.

    Please don't tell me I have a bad cat now. I have been driving the car about 40 miles each way to work for the past two months without any real issues, but for the instrument cluster fiasco. Car seems to be running great even right after the check engine light came on. Fuel economy didn't change one bit. Still getting about 26.9 mpgs

    Robert

  2. #2
    NostraJackAss Jack@European_Parts's Avatar
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    Hey Jack? I Just Got A P0431 Warm Up Catalyst; Bank 2: Efficiency Below Threshold

    Going to work this morning and I got a check engine light. Just checked it with VCDS and the only fault found was this one below.

    16815 - Warm Up Catalyst; Bank 2: Efficiency Below Threshold
    P0431 - 001 - Upper Limit Exceeded

    Before I screw myself over again I thought I would run this past the members here on what I should check.

    Please don't tell me I have a bad cat now. I have been driving the car about 40 miles each way to work for the past two months without any real issues, but for the instrument cluster fiasco. Car seems to be running great even right after the check engine light came on. Fuel economy didn't change one bit. Still getting about 26.9 mpgs

    Robert









    -------------------------------------------------------------------------------
    Address 01: Engine Labels: 06C-909-559-ASN.LBL
    Controller: 8E0 909 559 D
    Component: 3.0L V6/5V G 0002<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Indeed update firmware available for this part number as per TSB
    Coding: 0016751
    Shop #: WSC 63351
    VCID: 361FE21A015F
    5 Faults Found:
    17978 - Engine Start Blocked by Immobilizer
    P1570 - 008 - Implausible Signal
    18010 - Power Supply Terminal 30: Voltage too Low
    P1602 - 002 - Lower Limit Exceeded - Intermittent
    18107 - Powertrain Data Bus: Missing Message from Steering Wheel Electronics
    P1699 - 008 - Implausible Signal - Intermittent
    18043 - Powertrain Data Bus: Missing Message from A/C Controller
    P1635 - 008 - Implausible Signal - Intermittent
    18058 - Powertrain Data Bus: Missing Message from Instrument Cluster
    P1650 - 004 - No Signal/Communication - Intermittent
    Readiness: 0110 1101

    -------------------------------------------------------------------------------


    Robert,

    Let's hope not.
    Post a new auto-scan and obd2 data modes 1,3,7&9 please.

    Then I want you to clear faults and let's run readiness tests.
    Direct CAT tests are 0x01-04-046 & 047 please report all readiness tests & trims.

    https://forums.ross-tech.com/showthr...ut-0x01-08-000


    https://forums.ross-tech.com/showthr...ou!-Air-leaks!


    https://forums.ross-tech.com/showthr...uot-JPPSG-quot


    http://wiki.ross-tech.com/wiki/index...5/P0431/001073


    16815/P0431/001073 - Warm Up Catalyst; Bank 2: Efficiency Below Threshold

    Possible Causes


    • Warm Up Catalyst Bank 2 faulty

    Possible Solutions


    • Check Warm Up Catalyst Bank 2
      • Set Readiness

    • Replace Warm Up Catalyst Bank 2

    Special Notes


    • When found on the following, there may be a firmware update:
      • 2000 - 2001 Passat with ATQ engine, see TSB 01-07-07 (TPI 2010372)
      • 2000 - 2001 A4 or A6 with ATQ engine, see TSB 26-08-07 (TPI 2013086)
      • 2001 Allroad with APB engine, see TSB 01-08-20 (TPI 2005579)
      • 2001 A4 or A6 with APB engine, see TSB 01-08-34 (TPI 2012357)
    Last edited by Jack@European_Parts; 04-18-2019 at 01:25 AM.
    European Parts Emporium/Performance / Immobilizer Solutions EPE
    Certified Master Trained NY/BAR/BAD 7076062/ASE/SAE/NASTF Legal Factory Authorized/Licensed GeKo/FaZit # 403738
    Specializing in Custom Services IE: "welding-fabrication" / EPA-SMOG Update or Pass-Thru-Programming / Data Transfer / Immobilizers & OEM Quality Parts
    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
    www.FixMyEuro.com <<<<<CLICK HERE! or vwemporium@aol.com ( JPPSG & Unverified members need not PM me & Please don't email or call facility for free tech support...use the forum )
    Getting you CONTROL again of your property - TAKE IT! In Conjunction with.........

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  4. #3
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    Hi Jack,

    I have VCDS-Lite which doesn't have the options for obd2 data modes.

    Below is the 046 and 047 and new auto scan. I cleared the code last night and the check engine light stayed off for both commutes to work today.

    Code:
    VCDS-Lite Version: Release 1.2
    Thursday, 18 April 2019, 13:58:18:18369
    
    
    Chassis Type: 8E - Audi A4 B6
    Scan: 01,02,03,08,09,0F,11,15,16,17,18,36,37,45,46,55,56,57,65,67,69,75,76,77
     
    -------------------------------------------------------------------------------
    Address 01: Engine       Labels: 06C-909-559-ASN.LBL
       Controller: 8E0 909 559 D
       Component: 3.0L V6/5V      G   0002
       Coding: 0016751
       Shop #: WSC 63351
       VCID: 361FE21A015F
    No fault code found.
    Readiness: 0000 0100
    
    -------------------------------------------------------------------------------
    Address 02: Auto Trans       Labels: 01V-927-156.LBL
       Controller: 8E0 927 156 Q
       Component: AG5 01V 3.0l5V  USA 1213
       Coding: 0001002
       Shop #: WSC 06117
       VCID: 3C0BF0323F73
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes       Labels: 8E0-614-517.LBL
       Controller: 8E0 614 517 A
       Component: ABS/ESP allrad      1726
       Coding: 04497
       Shop #: WSC 06479
       VCID: 263F325AD1FF
    1 Fault Found:
    01317 -  Control Module in Instrument Cluster (J285)
                49-10 -  No Communications - Intermittent
    
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC       Labels: 8E0-820-043.LBL
       Controller: 8E0 820 043 G
       Component:   A4 Klimaautomat   0712
       Coding: 00000
       Shop #: WSC 63351
       VCID: 253D3556ACF9
    4 Faults Found:
    01274 -  Air Flow Flap Positioning Motor (V71)
                41-10 -  Blocked or No Voltage - Intermittent
    00604 -  Potentiometer Positioning Motor for Air Flow Flap (G113)
                30-10 -  Open or Short to Plus - Intermittent
    01592 -  Air Quality Sensor (G238)
                37-00 -  Faulty
    65535 -  Internal Control Module Memory Error
                00-00 -   -
    
    -------------------------------------------------------------------------------
    Address 09: Cent. Elect.       Labels: 8E0-907-279-8E2.LBL
       Controller: 8E0 907 279 E
       Component: int. Lastmodul  USA 0204
       Coding: 00013
       Shop #: WSC 63351
       VCID: 341BD8121723
    No Faults Found
      or DTCs not supported by controller
      or a communication error ocurred
    
    -------------------------------------------------------------------------------
    Address 15: Airbags       Labels: 8E0-959-655-84.LBL
       Controller: 8E0 959 655 A
       Component: Airbag 8.4E         3000
       Coding: 0010607
       Shop #: WSC 63351
       VCID: 351DE5161C59
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 16: Steering wheel       Labels: 8E0-953-549.LBL
       Controller: 8E0 953 549 L
       Component: LenksŠulenmodul     0308
       Coding: 01141
       Shop #: WSC 63351
       VCID: 3C0BF0323F73
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 17: Instruments       Labels: 8E0-920-9xx-8E2.LBL
       Controller: 8E0 920 950 L
       Component: KOMBI+WEGFAHRS. RB4 D36
       Coding: 00201
       Shop #: WSC 00001
       VCID: 8C6BE0F2AF53
       WAULT68E52A099660     AUZ6Z0A0208491
    1 Fault Found:
    01300 -  Control Module for Navigation with CD-Rom (J401)
                49-10 -  No Communications - Intermittent
    
    -------------------------------------------------------------------------------
    Address 36: Seat Mem. Drvr       Labels: 8E0-959-760.LBL
       Controller: 8E0 959 760 
       Component: Sitzmemory R2 F     0201
       Coding: 00002
       Shop #: WSC 63351
       VCID: F1959106A8B1
    2 Faults Found:
    01317 -  Control Module in Instrument Cluster (J285)
                49-10 -  No Communications - Intermittent
    00474 -  Control Module for Immobilizer
                49-10 -  No Communications - Intermittent
    
    -------------------------------------------------------------------------------
    Address 37: Navigation       Labels: None
       Controller: 4B0 919 887 D
       Component: BNS 4.1 H05    BNO 0005
       VCID: 341BD8121723
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 45: Inter. Monitor       Labels: 8E0-951-177.LBL
       Controller: 8E0 951 177 
       Component: Innenraumueberw.   0504
       Coding: 00001
       Shop #: WSC 00000
       VCID: EBA9836E8A9D
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 46: Central Conv.       Labels: 8E0-959-433-MAX.LBL
       Controller: 8E0 959 433 T
       Component: KomfortgerŠt T5B    0616
       Coding: 11788
       Shop #: WSC 63351
       VCID: 42F78ECA5D97
    3 Faults Found:
    01317 -  Control Module in Instrument Cluster (J285)
                49-10 -  No Communications - Intermittent
    01561 -  Left Rear Door
                59-10 -  Can't Unlock - Intermittent
    01562 -  Right Rear Door
                59-10 -  Can't Unlock - Intermittent
    
    -------------------------------------------------------------------------------
    Address 55: Xenon Range       Labels: 4Z7-907-357.LBL
       Controller: 4Z7 907 357 
       Component: dynamische LWR       D06
       Coding: 00060
       Shop #: WSC 63351
       VCID: 047B48D20703
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 56: Radio       Labels: 8E0-035-1xx-56.LBL
       Controller: 8E0 035 195 A
       Component: symphony II NP2    0008 
       Coding: 00201
       Shop #: WSC 00000
       VCID: 253D3556ACF9
    1 Fault Found:
    00858 -  Connection; Radio ZF Output to Antenna Amplifier
                36-00 -  Open Circuit
    
    End   --------------------------------------------------------------------------------------------------

  5. #4
    NostraJackAss Jack@European_Parts's Avatar
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    The RTFB says that firmware is to be up to date when referencing the TSB right Davy?

    European Parts Emporium/Performance / Immobilizer Solutions EPE
    Certified Master Trained NY/BAR/BAD 7076062/ASE/SAE/NASTF Legal Factory Authorized/Licensed GeKo/FaZit # 403738
    Specializing in Custom Services IE: "welding-fabrication" / EPA-SMOG Update or Pass-Thru-Programming / Data Transfer / Immobilizers & OEM Quality Parts
    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
    www.FixMyEuro.com <<<<<CLICK HERE! or vwemporium@aol.com ( JPPSG & Unverified members need not PM me & Please don't email or call facility for free tech support...use the forum )
    Getting you CONTROL again of your property - TAKE IT! In Conjunction with.........

  6. #5
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    Hi Jack,

    Keeping the firmware update as an option, but I'm wondering if an exhaust leak could be the real cause of the catalyst bank 2 efficiency code.

    I'm off today and I was just underneath the car and spotted this deteriorated exhaust clamp and when the car was running. I could hear the clamp leaking.

    Does anybody know which side is bank two?

    Going to get a new clamp anyways, but any thoughts on this besides the costly firmware update.



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  8. #6
    NostraJackAss Jack@European_Parts's Avatar
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    Could be, but I doubt it........

    Yawn......



    Don't buy a new clamp unless genuine, if AFT...... it will rot off in 6 months.

    Buy some stainless U bolt clamps at auto-parts store because the inside clamp shell is still good.
    European Parts Emporium/Performance / Immobilizer Solutions EPE
    Certified Master Trained NY/BAR/BAD 7076062/ASE/SAE/NASTF Legal Factory Authorized/Licensed GeKo/FaZit # 403738
    Specializing in Custom Services IE: "welding-fabrication" / EPA-SMOG Update or Pass-Thru-Programming / Data Transfer / Immobilizers & OEM Quality Parts
    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
    www.FixMyEuro.com <<<<<CLICK HERE! or vwemporium@aol.com ( JPPSG & Unverified members need not PM me & Please don't email or call facility for free tech support...use the forum )
    Getting you CONTROL again of your property - TAKE IT! In Conjunction with.........

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  10. #7
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    Benjisan 265. Would be interested if fuel trim a little chubbier on that bank seeing oxygen and adding fuel to compensate, might get lucky,

    LARIMORE

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  12. #8
    NostraJackAss Jack@European_Parts's Avatar
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    Meh.........

    Is the RTFB a lie?

    European Parts Emporium/Performance / Immobilizer Solutions EPE
    Certified Master Trained NY/BAR/BAD 7076062/ASE/SAE/NASTF Legal Factory Authorized/Licensed GeKo/FaZit # 403738
    Specializing in Custom Services IE: "welding-fabrication" / EPA-SMOG Update or Pass-Thru-Programming / Data Transfer / Immobilizers & OEM Quality Parts
    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
    www.FixMyEuro.com <<<<<CLICK HERE! or vwemporium@aol.com ( JPPSG & Unverified members need not PM me & Please don't email or call facility for free tech support...use the forum )
    Getting you CONTROL again of your property - TAKE IT! In Conjunction with.........

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  14. #9
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    Quote Originally Posted by Larry Manton View Post
    Benjisan 265. Would be interested if fuel trim a little chubbier on that bank seeing oxygen and adding fuel to compensate, might get lucky,

    LARIMORE

    I just ordered a set of new clamps from Amazon by a manufacturer named HJ Schulte. Company claims to make OEM parts for various automobile companies including Vw/Audi, Mercedes etc...

    Quality looks good and feedback from other buyers was excellent.

    When I was cleaning up the area around the clamp shell yesterday a big chunk of it fell off and the rest of the metal around that area where a u-bolt clamp would go was very soft. So a new clamp is needed.

    I'm going to try out the new clamp first and see if things improve. From further online research I found that bank 2 is the drivers side which happens to be the same side with the leaking rusted out clamp.

    As I was reading comments on the Amazon website there were a few comments from people who had a check engine light on for catalytic converters not being 100 percent efficient. And they recommended using a cheap 90 degree spark plug defowler to move the downstream 02 sensor a little further away from the exhaust gas in order to trick the ecm into seeing a more favorable reading.

    Of course I realize that that would only be a temporary fix if it actually works since the catalytic converter is likely going bad.


    Edit: How do I check the fuel trims? Can VCDS lite do it?

  15. #10
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    Quote Originally Posted by Jack@European_Parts View Post
    Could be, but I doubt it........

    Yawn......



    Don't buy a new clamp unless genuine, if AFT...... it will rot off in 6 months.

    Buy some stainless U bolt clamps at auto-parts store because the inside clamp shell is still good.

    Why do you doubt it Jack?

    Do the numbers for 046 and 047 look real bad?

    Wouldn't an exhaust leak throw off the 02 sensors reading?

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