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Spoke to soon!.............

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by MGTURBOM, Mar 5, 2012.

  1. MGTURBOM
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    MGTURBOM Member

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    [Mar 5, 2012]
    After five days the dPF light finally went out today. Used the car this evening, the glow plug light stared flashing followed by the appearance of the emmision control light! Car now has less power than my Astra diesel! Not dpf warning. I presume this is a trip to the dealer asap and theres no likely quick fix. Its an Audi 3.0tdi.
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  3. Gazthesparky
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    Gazthesparky Member VCDS Map User

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    [Mar 5, 2012]
    It's gone into limp mode when the DPF doesn't regenerate in a certain time it puts the engine into limp mode it then has to go to Audi for them to regenerate it manually. If the filter is above a certain level it is damaged and u will need a new filter :-( hope it all works out for you
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  4. MGTURBOM
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    MGTURBOM Member

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    [Mar 5, 2012]
    Thanks. I thought I'd got away with it when the dreaded dpf symbol went out! The filters going. Nothing but trouble!.......
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  5. murran
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    murran Active Member

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    [Mar 6, 2012]
    total pain in the backside these cats.
    had an early 08 passat in yesterday dash lit up like a christmas tree. had a throttle body fault too which meant the dpf couldnt go into its regenaration phase while being used normally, so we fitted a new throttle body and tried to do a forced regeneration but no. vas said the ash loading was 49%.......
    above 45% you have to fit a new dpf and reset the adaptions.

    new throttle body and new cat plus labour and dig. charge???? mayaswell cost a million pounds to some people. do vag think every one of their customers can folk out upwards of 1500 when some lights come on on the dash when the car thinks it has a bullsh1t problem?

    had to refit the old throttle body and the guys guna argue the toss for some goodwill out of the dealer.
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  6. MGTURBOM
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    MGTURBOM Member

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    [Mar 6, 2012]
    Thanks for the comments. I've spent most of the day trying to come up with the best solution. Car is still booked at Audi on the 12th. I tried JBS and they would remove the Dpf and do the re-map for just over a thousand! Spoke to a local company called German automotive. They offered to check the fault codes for 45 pounds. Try a re-gen for another 45 pounds, they also advised they could try and clean the filter. Did'nt investigate further at this point but may still return to them! Car is booked in on Thursday for a diagnostic check with an independant VAG specialist. He advised it will cost 15 pounds to run a dignostic but he wants the car cold so he can check sensors!?! He also mentioned brake lights can affect the managment lights. I know the car occasionally pops up with the centre barake light out but I doubt for one minute it would be somthing such as this? I think the diagnosis will determine the action to take regards removing the filter. I did ring another local 'specialist' this morning who advised only Audi can re-set the cars managment systems!
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  7. murran
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    murran Active Member

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    [Mar 6, 2012]
    id take it to the "£45 for a diagnostic check and maybe a forced regen for another £45" place.

    the key is tho if the ash loading is over that 45%, if it is then the diagnositics wont let you do a forced regen. then its new cat time!
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  8. MGTURBOM
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    MGTURBOM Member

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    [Mar 6, 2012]
    Yes your right. Thats what I'm going to do! I'll go into a bit more detail regards the cleaning of the dpf mentioned. If the cost outweighs removal then I'll get it taken out instead of replace it!
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  9. MGTURBOM
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    MGTURBOM Member

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    [Mar 8, 2012]
    So........took the car to the Independent to carry out a diagnostic today. They kindly informed me that they couldn't read any other fault codes other than to say that the filter was blocked, they could'nt get ash readings etc, so it was pretyy pointless! Apparently they never have trouble getting into the VAG system but on the occasion they were unable to do so. They still wanted forty five pounds off me! I kindly informed them they had not fulfiilled their end of the bargain so I wasn't paying!

    I contacted a company called in Birmingham ref deletion, he seemed alarmed he had e-mail quoted me 299 to remove the dpf as it was a 3.0. When asked how the filter was removed and the pipework to replace the response I got back was we can't give away that kind of information, its like asking a master chef what he puts in his pie! In other words you can't answer the question and you don't know!

    After days of research I'm ready to throw the towel it, take it to the dealer and just replace the filter if needed. I suspect its going to cost alot with the dealer but I have no confidence In any of these so called dpf specialists! especially when they are not prepared to explain the solution and associated hard wear to put the car right! It almost seems like none of them have ever removed the dpf from a 3.0!
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  10. murran
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    murran Active Member

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    [Mar 8, 2012]
    that passat i mentioned above, it was back in today lol.
    refitted the new throttle body, fitted new dpf, reset the adaptions with the vas and it took it thru a self test straight after.

    all seems ok!

    doesnt surprise me actually, doesnt sound like they have the diagnostic support to be calling themselves a "specialist".
    what i did with the vas 5052, there simply isnt the option to do it with the bosch kts650.

    where are you from? bring it to our place in sheffield?
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  11. MGTURBOM
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    MGTURBOM Member

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    [Mar 9, 2012]
    Im in Derby so not that far away! I actually got a bit more information about the car from the Notts Dealer. Don't know why I did'nt do it sooner. Before I took ownership of the car last year I had to wait as it had DPF light came on the day I was meant to collect it. Notts Audi were very helpful today and they pulled up job cards. The car went in on the 21st May last year with DPF light, core plug light and emission control light on. The dealer performed a manual re-gen. Car also went back in on the 19th July with DPF light on for a forced re-gen. Details recorded on this visit were an ash content of 49%, which was reduced to 7% by the end of the regen cycle!

    With those results the car must surely be able to accept forced re-gen again bearing in mind the dealer have done it successfully previous?!? Its still due in to the dealer Monday! With this information it must suggest the DPF isn't knachered!
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  12. murran
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    murran Active Member

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    [Mar 9, 2012]
    i too spoke too soon with that passat! lol. think there might be a dpf pressure sensor fault with it now.
    thought id start a thread lol.
    http://www.audi-sport.net/vb/general-automotive-chat/152228-46k-08-passat-dpf-g450.html

    theres something wrong with yours. unless its never being driven in a manner at which it can regenerate on the road while being used.
    it shouldnt be needing a forced regen every 3 months or so.

    conditions for normal regen while driving should be constant in gear 4th/5th revs around 2-2.5k. the dpf collects the particulates (soot) when the conditions for regen are met, the ecu purposfullly allows the dpf temps to rise in order to burn the soot off in a clean manner.
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  13. MGTURBOM
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    MGTURBOM Member

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    [Mar 10, 2012]
    The Passat does sound like it may be suffering with a more extreme case of what I have wrong with mine. I suppose that if a pressure sensor is faulty and it doesn't know it is then it would show as a fault code. When the job cards were raised for mine on both occasions the car car did'nt show any other faults.

    On the 23rd of February the car did a 255 mile round trip to London so it should have been able to regen correctly. If you also consider the endless 50mph zones further down towards the M25 after a good run, these kind of driving conditions should be ideal. I've had the car since Jully last year. Dpf light has been on four times prior to this occasion. Just after I got it, went out quickly. It came on christmas day and was a sod to get rid of then. The last occasion was the 23rd driving to London. Strangely it went out just five minutes into my Journey so the car could'nt have been properly warmed up!

    I'll keep you posted on the results on Monday. It may well highlight somthing that will be useful for the Passat.
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  14. murran
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    murran Active Member

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    [Mar 10, 2012]
    well based on what i was reading online last night, we ordered and fitted a new g450 sensor this morning. despite no real evidence of it being faulty, like fault codes for it and indeed the vas test saying it was fine!

    fitted it and went thru the adaptions again, and boom, light went out, cleared engine light FIRST TIME....... and no more limp mode. all in 10 mintues.......
    it wouldnt do this at all yesterday. i spent about an hour going round and round with the diagnostics.
    anyway my boss is using the car this weekend to make sure its ok. we'll see.

    obviously the sensor was faulty enough to upset the ecu stopping it completeing the adaptions, but not enough to flag up a fault specifically for it.

    if i were you... for £45 and the 10mins it takes to fit, id get a new g450!

    i think vag are guna be seeing alot more dpf faults in future!
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  15. MGTURBOM
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    MGTURBOM Member

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    [Mar 12, 2012]
    Got the car back from the Audi dealer today. They replaced the exhaust gas pressure sensor and air filter. Car was taken on an extended 75 mile road test and its fine! No need for a forced regen. I think the results add weight to the cause being a faulty sensor rather than a blocked dpf. Car feels great and the dealer was superb today.
    :rockwoot:

    Has the Passat remained problem free?
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  16. murran
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    murran Active Member

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    [Mar 12, 2012]
    to my knowledge yes the passats been fine (as in no lights or limp mode while our boss used it over the weekend.) customer had it back this afternoon.

    yay for you tho! how much did you pay just out of interest?
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  17. MGTURBOM
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    MGTURBOM Member

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    [Mar 13, 2012]
    In total it was 180 pounds. The sensor was 45 pounds. Bearing in mind that sort of cost it's a part thats got to be worth replacing for anyone else experiecing the same symptoms! Both the local Audi dealers have been very helpful and I'm hoping the car should be less prone to dpf lights in the future!
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