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Thread: Audi A6 2006 with EVAP problem (P2404)

  1. #1
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    Question Audi A6 2006 with EVAP problem (P2404)

    My Audi A6 2006 is having persistent P2404 CEL codes. I can go a few days, then one pops up. I have looked at various engine vacuum lines (and fixed one that was causing a slew of other codes, the tube near the oil dipstick that is a common problem). I replaced the Purge Value, no change, and also replaced the J757 relay that Bentley claims is often the problem. The gas cap looks good and the o-ring is in good condition.

    I have read that the Audi VAG tool can be used to test the EVAP system:

    "Yes, with VAG-com. Go into 01 engine electronics, 04 basic settings, group 070 and 071. One is a tank leak check, the other is purge valve function."

    I didn't see anything on the Ross-Tech site or in the manual about this. Is there an EVAP test I can run using your software?

  2. #2
    NostraJackAss Jack@European_Parts's Avatar
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    My Audi A6 2006 is having persistent P2404 CEL codes. I can go a few days, then one pops up. I have looked at various engine vacuum lines (and fixed one that was causing a slew of other codes, the tube near the oil dipstick that is a common problem). I replaced the Purge Value, no change, and also replaced the J757 relay that Bentley claims is often the problem. The gas cap looks good and the o-ring is in good condition.

    I have read that the Audi VAG tool can be used to test the EVAP system:

    "Yes, with VAG-com. Go into 01 engine electronics, 04 basic settings, group 070 and 071. One is a tank leak check, the other is purge valve function."

    I didn't see anything on the Ross-Tech site or in the manual about this. Is there an EVAP test I can run using your software?




    Did you see the P-code forum here?

    Please post a complete auto-scan in code tags and maybe have a look at the repair manual.

    www.erwin.audi.com

    Here is a helpful link........

    http://wiki.ross-tech.com/wiki/index...6/P2404/009220

    Ahhhh you could use the output tests for the N80 and LDP in addition to those 070 and 071 block tests.
    0x1-03 GO/NEXT! RTFB

    There is this thingy they call a mighty vac I suggest you do some reading on.

    Smoke in a CAN?
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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    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 )
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    Actually I misstated where I read about J757 - it was from the Ross-Tech WIKI you reference. The tests - well, I have read the Bentley manual. They usually reference some VAG setting or other tool not easily found. That's why I asked - is there a specific set of directions to diagnose this one failure. I guess not, but that's why I asked.

    I have a Mini-Vac tool - it shows that the tube near the dipstick is not holding vacuum, but this with the engine turned off. Should it hold vacuum? well, no way to tell - there is nothing I can find that tells you this. So sure, I can pull the rear wheel off, try to figure out what tube is what, and use a plug to verify the pipe/hose is not leaking. All that said, there are so many complaints about this particular code - I was hoping there might be something besides "read the manual" (which is not for the faint of heart).

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    NostraJackAss Jack@European_Parts's Avatar
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    have a Mini-Vac tool - it shows that the tube near the dipstick is not holding vacuum, but this with the engine turned off. Should it hold vacuum? well, no way to tell - there is nothing I can find that tells you this. So sure, I can pull the rear wheel off, try to figure out what tube is what, and use a plug to verify the pipe/hose is not leaking. All that said, there are so many complaints about this particular code - I was hoping there might be something besides "read the manual" (which is not for the faint of heart).


    Nope..........Isolate zones manually......


    It starts with the heart of information called an auto-scan....... to establish all attributes.

    "Core control is aware of the problem .......no information is currently available"

    Auto-scan please or security access is a negative response from controller.
    Last edited by Jack@European_Parts; 06-17-2015 at 03:56 PM.
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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    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 )
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    I'm quite new to this tool, and having a hard time understanding what your reply means. I see there is an "Auto-Scan" button. Are you telling me if I auto-scan, I may get more codes that will help me determine the problem?

    With the cracked tube - the one going to the EVAP pump - I was getting a slew of errors. Finding and fixing that pipe caused most codes to go away. But I didn't do an auto-scan, so guess I can do that and see what happens.

    Have no idea of what "security access is a negative response from controller" means - possibly that without posting the results of auto-scan no one can help me?

    In any case, I'll isolate all the components by hand and try to find a leak somewhere.

    Thank you for replying.

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    David,

    One of the things Jack is trying to tell you is that in a modern car, with all the systems heavily networked together, it's important to look at any issues in a holistic manner, i.e. in the context of the whole car. That's why we ask people to post complete Auto-Scans. There's a tutorial on how to do that here.

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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    NostraJackAss Jack@European_Parts's Avatar
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    Crimp tests of the N80 line should be done to see if the valve is stuck open, while doing the LDP 071 test and very common.

    A dead give away the N80 is open is the fuel tank will suck down, instead of pressurizing...... like a beer can being crushed.

    It sucks down so hard the straps can appear loose on tank visually.



    "Core control is aware of the problem .......no information is currently available"

    Sorry for my poor humor from BSG.
    Last edited by Jack@European_Parts; 06-17-2015 at 06:43 PM.
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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    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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    I ran a complete scan, and there were these 3 errors:

    Code:
    -------------------------------------------------------------------------------
    Address 01: Engine (AUK)       Labels: 06E-910-559-BKH.lbl
       Part No SW: 4F1 910 559 F    HW: 4F1 907 559 A
       Component: 3.2l V6 FSI         0040  
       Revision: --H15---    Serial number:               
       Coding: 010D0106190F0120
       Shop #: WSC 98765 666 36124
       VCID: 2E591F2BB93C7D51CC3-807B
    
    1 Fault Found:
    009220 - EVAP Leak Detection Pump Sense Circuit 
                   P2404 - 006 - Implausible Signal - MIL ON
                 Freeze Frame:
                        Fault Status: 10100001
                        Fault Priority: 4
                        Fault Frequency: 10
                        Reset counter: 40
                        Mileage: 187356 km
                        Time Indication: 0
                        Date: 2015.06.11
                        Time: 08:13:31
    
                 Freeze Frame:
                        RPM: 2080 /min
                        Mass Air / Rev.: 294.3 mg/str
                        Temperature: 91.5C
                            Part Throttle
                        Voltage: 13.77 V
                        Speed: 61.0 km/h
    
    Readiness: 0000 0100
    
    -------------------------------------------------------------------------------
    -------------------------------------------------------------------------------
    Address 19: CAN Gateway        Labels: 4F0-910-468.lbl
       Part No SW: 4F0 910 468 A    HW: 4F0 907 468 D
       Component: Gateway         H10 0060  
       Revision: 10          Serial number: 120080560282B7
       Coding: 6CFE73CD1B1106
       Shop #: WSC 01115 444 54714
       VCID: 2757EA0F96C62C190F5-8072
    
    1 Fault Found:
    00470 - Company Comfort Databus in Single Wire 
                011 - Open Circuit - Intermittent
                 Freeze Frame:
                        Fault Status: 00101011
                        Fault Priority: 3
                        Fault Frequency: 1
                        Reset counter: 180
                        Mileage: 187663 km
                        Time Indication: 0
                        Date: 2015.06.18
                        Time: 11:14:33
    
    
    -------------------------------------------------------------------------------
    -------------------------------------------------------------------------------
    Address 61: Battery Regul.        Labels: 4F0-910-181.lbl
       Part No SW: 4F0 910 181 E    HW: 4F0 915 181 A
       Component: ENERGIEMANAGER  H12 0490  
       Revision: 00000000    Serial number: 00000000050776
       Shop #: WSC 02445 823 62659
       VCID: 234FFE1FE2FEC03953D-8076
    
       Subsystem 1 - Part No: 4F0 915 105 E
       Component: von VA0  1506090014       
       Coding: 344630393135313035452056413031353036303930303134
       Shop #: WSC 00000 384 00290
    
    1 Fault Found:
    02256 - Quiescent Current 
                001 - Upper Limit Exceeded - Intermittent
                 Freeze Frame:
                        Fault Status: 00100001
                        Fault Priority: 7
                        Fault Frequency: 41
                        Reset counter: 188
                        Mileage: 185613 km
                        Time Indication: 0
                        Date: 2015.05.03
                        Time: 23:34:30
    
    
    -------------------------------------------------------------------------------

    What I found really interesting was that the air temperature was close to boiling in the P2404 error: "91.5C"
    Last edited by Uwe; 06-22-2015 at 01:35 PM.

  9. #9
    Verified VCDS User Keithuk's Avatar
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    Quote Originally Posted by dhoerl View Post


    -------------------------------------------------------------------------------
    -------------------------------------------------------------------------------
    Address 19: CAN Gateway Labels: 4F0-910-468.lbl
    Part No SW: 4F0 910 468 A HW: 4F0 907 468 D
    Component: Gateway H10 0060
    Revision: 10 Serial number: 120080560282B7
    Coding: 6CFE73CD1B1106
    Shop #: WSC 01115 444 54714
    VCID: 2757EA0F96C62C190F5-8072

    1 Fault Found:
    00470 - Company Comfort Databus in Single Wire
    011 - Open Circuit - Intermittent
    Freeze Frame:
    Fault Status: 00101011
    Fault Priority: 3
    Fault Frequency: 1
    Reset counter: 180
    Mileage: 187663 km
    Time Indication: 0
    Date: 2015.06.18
    Time: 11:14:33
    I don't know why users always post 00470 - Company Comfort Databus in Single Wire when its Combination Comfort Data Bus in Single Wire.

    http://wiki.ross-tech.com/wiki/index.php/00470
    New User Keith

    2010 Golf GTD (170) CBBB, 5 Door, Shadow Blue (P6/D5Q), Flat Tyre Indicator, Basic Protection Pack + VCDS.

  10. #10
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    We do it because we are stupid ignorant noobies, and just do what the experts (see above) tell us (i.e., post the results of your Auto-Scan). In my particular field of endeavor, I'm not a noobie nor am I ignorant of the general expertise level, but here I am. Sorry you have to endure my ramblings.

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