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Thread: DPF Regeneration failure on 2012 VW Touareg TDI

  1. #21
    Professional User Jetta ,97's Avatar
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    Quote Originally Posted by amizan View Post
    Hi Marin, you had done an ECU reprogram for me a few months back (thanks!)

    So you are saying that it's most likely the DPF? I can get a hold of a used DPF for $400-$500 and from what I see changing it on the Touareg does not require a lot of labor if you have a few swivel wrenches. Going in to get measurements on that damn sensor is a pain because it's so tight and hot in there next to the firewall so I'm considering biting the bullet and changing the DPF because I am afraid that this will fix the whole thing since i'm pretty confident that I did the sensor replacement correctly.
    You do not need to replace it , you can clean it .
    Jack has very good susses with Easy off oven cleaner, Aks Jack which one is good.
    After that with VCDS you can tell ECU that DPF is replaced and you should be good to go.
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  3. #22
    Professional User Jetta ,97's Avatar
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    Quote Originally Posted by Uwe View Post

    Code:
    14:26:01
      IDE00434   Particle filter: soot mass calculated 29.05 g
      IDE00435   Particle filter: soot mass measured 1.92 g
      IDE00436   Particle filter: kilometers since last regeneration 1251116 m
      IDE01407   Particle filter: fuel consumption since last regeneration 102.13 l
    1251 km since last regeneration, but measured soot is only 1.92 g. And yes, the last 750 miles (actually more like the last 1300 miles) were almost all highway driving, 75-80 mph. But drive with a bad sensor in the city for some time, where the DPF does not get hot enough to keep itself clean, and I think the results will be quite different.

    -Uwe-
    How many miles on your car?
    You Ash level is very low , so I assume it is low miles car
    Master Technician for German cars
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  4. #23
    Benevolent Dictator Uwe's Avatar
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    Quote Originally Posted by Jetta ,97 View Post
    How many miles on your car?
    You Ash level is very low , so I assume it is low miles car
    Yes, just under 42,000 miles.

    -Uwe-
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  5. #24
    NostraJackAss Jack@European_Parts's Avatar
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  7. #25
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    Quote Originally Posted by Jack@European_Parts View Post
    thanks guys. I am a newbie. Don't I have to cut the DPF open to clean it? I saw some instructions online that I have to cut it open and then re-weld it... Am I wrong?

  8. #26
    Professional User Jetta ,97's Avatar
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    Quote Originally Posted by Uwe View Post
    Yes, just under 42,000 miles.

    -Uwe-
    That explains everything , plus I am 100% sure you use 504/507 oil all the time.
    Now this is how it goes:

    -IDE00434 Particle filter: soot mass calculated 29.05 g-----calculate soot since last time regeneration
    -IDE00435 Particle filter: soot mass measured 1.92 g-----total soot in DPF

    At 42k it is very normal to have total soot around 2g using proper oil .

    I have seen this number jumps to 50g in 10000 miles if you use high ash oil , so on those cars low ash oil mean a lot . Plus HWY driving and city driving will make big difference .
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  9. #27
    Professional User Jetta ,97's Avatar
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    Quote Originally Posted by amizan View Post
    thanks guys. I am a newbie. Don't I have to cut the DPF open to clean it? I saw some instructions online that I have to cut it open and then re-weld it... Am I wrong?
    No you do not ,
    Remove DPF ,
    spray Easy off on top of the inlet pipe at DPF , make sure DPF in standing up side , after some time (15-20 min) good flow of water from Top side of DPF will clean everything ,do this few times till you see almost clear water out ,
    After that need air compressor to blow as much you can water out , let it dry on Sun for few Hr and it should be good.


    JACK correct me if I am missing something
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  11. #28
    Benevolent Dictator Uwe's Avatar
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    Quote Originally Posted by Jetta ,97 View Post
    I am 100% sure you use 504/507 oil all the time.
    Yes, and I don't think it has ever been more than 7,500 miles between changes. Since this vehicle has become essentially irreplaceable, I intend to keep it for a long time.

    Quote Originally Posted by Jetta ,97 View Post
    Now this is how it goes:

    -IDE00434 Particle filter: soot mass calculated 29.05 g-----calculate soot since last time regeneration
    -IDE00435 Particle filter: soot mass measured 1.92 g-----total soot in DPF

    At 42k it is very normal to have total soot around 2g using proper oil.
    I'm not sure I understand what you are saying. I would expect the measured soot mass to rise between regeneration, and then to fall again after a regeneration. Is this incorrect?

    -Uwe-
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  12. #29
    Professional User Jetta ,97's Avatar
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    Quote Originally Posted by Uwe View Post
    Yes, and I don't think it has ever been more than 7,500 miles between changes. Since this vehicle has become essentially irreplaceable, I intend to keep it for a long time.


    I'm not sure I understand what you are saying. I would expect the measured soot mass to rise between regeneration, and then to fall again after a regeneration. Is this incorrect?

    -Uwe-
    You will see how time goes getting more miles ,if you watch while doing regeneration soot mass calculated will go very low , sometimes to 0, but soot mass measured will stay higher and higher as well ash value.
    Master Technician for German cars
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  13. #30
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    Quote Originally Posted by Jetta ,97 View Post
    No you do not ,
    Remove DPF ,
    spray Easy off on top of the inlet pipe at DPF , make sure DPF in standing up side , after some time (15-20 min) good flow of water from Top side of DPF will clean everything ,do this few times till you see almost clear water out ,
    After that need air compressor to blow as much you can water out , let it dry on Sun for few Hr and it should be good.


    JACK correct me if I am missing something
    Thanks guys that's a lot of help. One more question, I put the car on jack stands to look underneath where the DPF is at the 2012 Touareg. it looks like I can unlodge it with a few swivel flexible wrenches but I do not have a lift unfortunately that would have made life a lot easier. how big of a job is it? I have a few bolts that are rusted It seems and I might have to cut them off and also one of the frame support bars is In the way. do you recall if I have to remove the support bar and is this job doable on jackstands? or am I better off going to a place that rents lift bays?

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