Emissions Garage! message, more of

Discussion in 'Mk5 VW Jetta, Sportwagen, and Audi A3 TDI forum' started by yesican, Jul 1, 2012.

  1. yesican

    yesican New Member

    Joined:
    May 26, 2012
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    14
    Car:
    Golf GT TDi 4Motion 2006
    Hi experts and others
    You may not have noticed that I am on p2 of my previous thread, so apologies for starting a new one.

    I have reassembled after cleaning inlet manifold EGR valve and manifold flap, and the warning is still present. The car is a Sep 2006 Golf GT TDI with BKD engine

    I have been given conflicting advice. The amber symbol described in the user manual as, “Exhaust gas warning lampâ€￾ is on all the time and each time the ignition is turned on “Emissions Garage!â€￾ is displayed for a few seconds. The car seems to be running normally. One reliable garage man has told me that after working on the problem the light will stay on until reset and I need to let the car have several periods of use before the sensors will decide if the problem has gone away. So I should drive the car then bring the car in to have the fault warning reset, and hope the light does not come on again. Another professional, associated with diagnostics, told me that the fault warning only needs resetting with safety items like airbags, and that in the case of engine matters, if the fault disappears the light goes out. Also he said that if I disconnect the battery, then reconnect, memory of this sort of fault would be wiped and so if the warning comes on before even starting the engine that suggests an electrical problem. Can anyone with knowledge or personal experience comment?
    Thanks
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  2. yesican

    yesican New Member

    Joined:
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    Car:
    Golf GT TDi 4Motion 2006
    Emissions Garage! part 3

    Disappointing not to get any advice on my problems, but for the information of others I have progressed. I now have a Ross-Tech VCDS (VAG-COM) MicroCAN (available in the UK from Glendan for £208). It has given me some information in more detail than the non VW garage that I paid £42 for a diagnostic read-out. What is also helpful is that I have been able to extinguish the warning light and message, make a short journey and found the light still out. If the light comes back on I hope to be able to identify the problem more easily with my gizmo
  3. chittychittybangbang

    chittychittybangbang Administrator

    Joined:
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    22,269
    Car:
    2006 Jetta TDI
    Location:
    CT
    yes, clear codes and see what comes back, Try to keep posts on a single topic or follow ups in 1 place so people can read previous posts, I can merge your posts if you wish.
  4. yesican

    yesican New Member

    Joined:
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    Car:
    Golf GT TDi 4Motion 2006
    OK to merge. I thought no one had noticed I was on page 2! Light has come on again. I am today going to try to learn what everything on the VCDS means
  5. yesican

    yesican New Member

    Joined:
    May 26, 2012
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    Car:
    Golf GT TDi 4Motion 2006
    Solved at last

    The problem is now solved! It was the EGR valve. I did a number of checks and tests using my VCDS.I repeatedly got the following:

    1 Fault Found:

    001025 - EGR System
    P0401 - 000 - Insufficient Flow
    Freeze Frame:
    Fault Status: 01110000
    Fault Priority: 0
    Fault Frequency: 3
    Mileage: 144916 km
    Time Indication: 0
    Date: 2000.00.00
    Time: 17:45:50

    Freeze Frame:
    RPM: 1386 /min
    Speed: 0.0 km/h
    Load: 9.8 %
    Duty Cycle: 14.6 %
    Duty Cycle: 100.2 %
    Mass Air / Rev.: 270.0 mg/str
    Mass Air / Rev.: 525.0 mg/str.

    I did not want to purchase expensive components and then find, for instance that it was only a leaking or blocked vacuum pipe, so eventually I went to a small VW specialist and asked for a diagnostic report only. The report said, “Investigated EML on, carried out diagnosis, found diaphragm in EGR leaking, causing EGR not to function, advise replace EGR, further testing may be required.â€￾ I was not able to ascertain how they made this assessment. Perhaps the repair manual requires certain test procedures that isolate the fault. I have emailed Ross-Tech to ask if I could have worked this out myself using the VCDS. They have not yet answered. I fitted a new EGR valve and the problem has disappeared. If anyone knows how the specialist made the correct diagnosis or better still how I could have I would be grateful,
  6. Doright

    Doright New Member

    Joined:
    Jul 7, 2012
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    16
    Car:
    06 Jetta
    I looked for your other thread but couldn't find it? :confused:
    I would like to read it so I can compare notes to my problem.

    Did you make any Log's with your VCDS and post them? those would help a lot!

    I'm happy for you getting your car fixed I too am going it alone as no one has posted to my thread either. :confused:
  7. yesican

    yesican New Member

    Joined:
    May 26, 2012
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    Car:
    Golf GT TDi 4Motion 2006
    Hindsight

    Doright:
    If you click on my name in blue on the left you should get all my posts so that would lead you to my earlier ones. I started on 20th June, but they are not particularly interesting with no earlier logs. One of the difficulties is that the same basic engine has many different forms and this affects the layout of things like EGR intake manifold flap (IMF) etc. With hindsight what I should have done for my engine (a BKD, the 1st 3 characters of the engine number) after testing and getting the message "001025 - EGR System P0401 - 000 - Insufficient Flow" was 1st remove the EGR valve and IMF together. I would have then seen whether the intake manifold and EGR were sufficiently sooted up to cause the problem. They weren't in my case, so there was no need to take off the manifold and get it cleaned. I asked a VW dealer if they could test my EGR when I visited to get gaskets, but they declined. I should have insisted even if I had to book it in. When everything is assembled there is a facility with my VCDS called Output tests where the ECU runs a sequence of outputs electrically to various components. The sequence in my case can be run with or without the engine running. If the engine is not running there will be no vacuum so the EGR will not respond. But the electrical IMF does respond; you can hear it winding open and shut. If the engine is running when the IMF is actuated closed the engine will stop. I was pretty sure my expensive IMF (£349 in UK) was working OK because of these tests. There is a vacuum solenoid valve that dispenses suction via 6 pipes to different locations. I did not know how to test this except by putting my finger over the pipe when the engine was running; a bit crude! I did think it might be a leak in the vacuum pipe, but i wedged 1 end in my tyre footpump and put my finger over the other end and it would hold about 15psi for as long as I could last. The fact that my EGR had a leaking diaphragm would explain why I could sometime make a journey without getting the warning light.
    Hope this helps, at least for those with BKD engines

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