hello 

help please 

the mass soot calculated progress rapidely and start regeneration everytime .

how can i reset mass soot calculated .

You cannot reset the value as it's calculated inside the ECU and not a physical measurement.

 

The only way it can be lowered is when the car is either driven on motorway, or when it does active regeneration cycle of DPF system.

 

It might indicate a fault in the car if the value is high.

 

 

Can you indicate why you are having trouble, or what you see when using the car?  So is exhaust lamp lighting up, engine light or is the car going into limp mode?

How are you identifying this soot calculation - VCDS etc? This may suggest ash level is excessive and preventing a proper regen, or differential pressure switch is defective. Per the normal replies, you need to have car read for any issues, and also advise engine (1.2, 1.4 or 1.6 TDI), mileage, how long this has been going on and if issue has arose since any maintenance or component changes. Have you tried a DPF clean additive in the fuel.

 A forced regen can be instigated through VCDS and I believe that there may be Android apps that will measure value, and maybr force a regen.

Edited 24 February, 20233 yr by KeithCheetham

13 minutes ago, varooom said:

 

there is no problem, the car works perfectly, no dashboard lights.
the only concern is that the mass of soot calculated by the ECU increases very quickly compared to the mass of soot measured by G450.
this triggers regeneration even if the DPF is empty

Edited 24 February, 20233 yr by lounas

18 minutes ago, varooom said:

You cannot reset the value as it's calculated inside the ECU and not a physical measurement.

 

The only way it can be lowered is when the car is either driven on motorway, or when it does active regeneration cycle of DPF system.

 

It might indicate a fault in the car if the value is high.

 

 

Can you indicate why you are having trouble, or what you see when using the car?  So is exhaust lamp lighting up, engine light or is the car going into limp mode?

there is no problem, the car works perfectly, no dashboard lights.
the only concern is that the mass of soot calculated by the ECU increases very quickly compared to the mass of soot measured by G450.
this triggers regeneration even if the DPF is empty

4 minutes ago, lounas said:

there is no problem, the car works perfectly, no dashboard lights.
the only concern is that the mass of soot calculated by the ECU increases very quickly compared to the mass of soot measured by G450.
this triggers regeneration even if the DPF is empty

That's normal, but can you define how quickly it rises?

 

And if you answer @KeithCheetham questions also, then we will know more about engine and how many Km driven.

26 minutes ago, KeithCheetham said:

How are you identifying this soot calculation - VCDS etc? This may suggest ash level is excessive and preventing a proper regen, or differential pressure switch is defective. Per the normal replies, you need to have car read for any issues, and also advise engine (1.2, 1.4 or 1.6 TDI), mileage, how long this has been going on and if issue has arose since any maintenance or component changes. Have you tried a DPF clean additive in the fuel.

 A forced regen can be instigated through VCDS and I believe that there may be Android apps that will measure value, and maybr force a regen.

thank you for the answer
the car is a fabia 1.6 tdi 75 it has 158000 km.
scan vcds no fault code.
I measured the soot with vcds.
the soot level returns to 00 after each regeneration but the calculated soot level increases rapidly which triggers a new regeneration.
the level of soot measured is correct it increases slowly (G450 changed and adapted).
I have to find out why the calculated soot level is increasing rapidly and thus stop the repeated regenerations.

Do you have a VCDS auto scan log you can upload?  Have you found the MVB for how many Km since regeneration process.

 

Maybe good idea if you can also if possible use VCDS to log the soot calculated and measured so we can see how quickly it increases.

12 minutes ago, varooom said:

That's normal, but can you define how quickly it rises?

 

And if you answer @KeithCheetham questions also, then we will know more about engine and how many Km driven.

thank you for the answer
the mass of soot measured barely rises to 0.5 gm in 200 km
but the mass of soot calculated arrives in less than 200 km at 24 gm which triggers regeneration.

10 minutes ago, varooom said:

Do you have a VCDS auto scan log you can upload?  Have you found the MVB for how many Km since regeneration process.

 

Maybe good idea if you can also if possible use VCDS to log the soot calculated and measured so we can see how quickly it increases.

thank you so much
yes I have vcds, the last regenerations occurred after 148 km and the second after 214 km.
the calculated and measured soot mass returns close to zero after each regeneration. but the calculated soot mass is increasing very quickly (no vcds fault code).
example: the last reheeration was triggered with the following measures:
soot mass calculated: 24 gm
soot mass measured: 0.4 gm
mileage since last regeneration: 214 km

There seems to be a correlation with the DPF reaching 100k miles (160k km) and the ECU deciding that a new one is needed, this is not the first thread to highlight this unpleasant reality!

If the DPF is replaced the dealer can reset the ECU so that the regen interval returns to normal.

There will be a lot of ash in the old DPF, I've cut one open and seen it.

To me it seems your car runs good, not generating much measured soot.

 

The calculated soot is calculated by driving routines, short journeys will increase value, motorway journeys should decrease this value.

 

Are you doing short local journeys?

6 minutes ago, varooom said:

To me it seems your car runs good, not generating much measured soot.

 

The calculated soot is calculated by driving routines, short journeys will increase value, motorway journeys should decrease this value.

 

Are you doing short local journeys?

I've been driving on the highway but it doesn't change anything.  calculated soot always increases fast

25 minutes ago, sepulchrave said:

There seems to be a correlation with the DPF reaching 100k miles (160k km) and the ECU deciding that a new one is needed, this is not the first thread to highlight this unpleasant reality!

If the DPF is replaced the dealer can reset the ECU so that the regen interval returns to normal.

There will be a lot of ash in the old DPF, I've cut one open and seen it.

thank you for the answer .  I think the car is running well but the only problem is the calculated soot value which increases rapidly compared to the measured soot which triggers unnecessary regenerations

They are hardwired to do a regeneration at a maximum of 1,000km regardless.  I suspect that this value drops down to compensate for the age of the DPF filter.

 

The software in the car ECU handles this, and maybe there's an update, but don't expect a miracle.

 

The other choice is to lie to car, and tell it that it has a new DPF filter installed... do this at own risk (the car can still measure physical soot via G450)

8 minutes ago, varooom said:

They are hardwired to do a regeneration at a maximum of 1,000km regardless.  I suspect that this value drops down to compensate for the age of the DPF filter.

 

The software in the car ECU handles this, and maybe there's an update, but don't expect a miracle.

 

The other choice is to lie to car, and tell it that it has a new DPF filter installed... do this at own risk (the car can still measure physical soot via G450)

Thank you 

what will happen if i reset the dpf?  do you think it will be possible to enter the old dpf data in the event of a problem?

1 minute ago, lounas said:

Thank you 

what will happen if i reset the dpf?  do you think it will be possible to enter the old dpf data in the event of a problem?

You might be able to test beforehand.

 

So you need to use VCDS security access function, so it might be needing a login code S12345 for an example.  Then view measured value blocks to see how much distance it records for the DPF and drop value by 10, see if you can save.

 

Then if it allows, you know you can write back distance value.

 

The above login code might be incorrect, and it also might not be possible with VCDS. (Make a Google search to see if possible)

I made my vehicle think it had a new DPF, the oil ash level dropped to zero but the calculated soot mass was still rising much faster than the measured and the regenerations were happening almost as quickly as yours.

 

I should explain that I have an EGR emulator/simulator, no EGR gases pass but the ECU thinks they do, that I believe is the reason for the massive difference between the calculated and measured soot loadings, unfortunately the ECU is triggered on calculated.

 

The final straw was a series of 800km autoroute journeys towing a very large wide fronted and heavily overloaded trailer, my foot was to the floor most of the time, fuel consumption was 24mpg and oil temp always over 100°c, the engine would have been perpetually passive regenerating yet the ECU commanded several active regens during those journeys and the very next day after arriving it was trying again.

 

I have resolved the problem now by paying for an emissions fix rollback, I have heard 2 maybe 3 regens in the 10 months since it was done although they might be happening every 1000 kms or miles.

Edited 24 February, 20233 yr by J.R.

5 minutes ago, varooom said:

You might be able to test beforehand.

 

So you need to use VCDS security access function, so it might be needing a login code S12345 for an example.  Then view measured value blocks to see how much distance it records for the DPF and drop value by 10, see if you can save.

 

Then if it allows, you know you can write back distance value.

 

The above login code might be incorrect, and it also might not be possible with VCDS. (Make a Google search to see if possible)

with my vcds I can just reset the dpf and set the values of the total accumulated soot to zero

2 minutes ago, lounas said:

with my vcds I can just reset the dpf and set the values of the total accumulated soot to zero

I have ODIS also, so I think I can edit the value.

 

If you read @J.R. Post, I would like to see your VCDS autoscan to see which engine software you have (asked earlier) as I can advise of a possible previous version.

If you read my posting that uploaded while you were typing you will see that I reset mine to zero but it did nothing to change the problem, the ECU triggers on a calculated soot load and ignores the measured one, it does not seem to take any account of the oil ash volume whether it thinks it is full or has been told it is empty.

 

What worked for me and worked like a charm was the emissions rollback, my UK next door neighbour has an Octavia which he has never allowed to have the emissions fix, he had never heard the cooling fans running when he stopped, mine was doing it at the end of every journey less than 20 miles unless I drove straight back out again to let it complete.

 

Now with the rollback my car is like my neighbours.

12 minutes ago, J.R. said:

If you read my posting that uploaded while you were typing you will see that I reset mine to zero but it did nothing to change the problem, the ECU triggers on a calculated soot load and ignores the measured one, it does not seem to take any account of the oil ash volume whether it thinks it is full or has been told it is empty.

 

What worked for me and worked like a charm was the emissions rollback, my UK next door neighbour has an Octavia which he has never allowed to have the emissions fix, he had never heard the cooling fans running when he stopped, mine was doing it at the end of every journey less than 20 miles unless I drove straight back out again to let it complete.

 

Now with the rollback my car is like my neighbours.

thank you for the answer.  So what do you think you would recommend me to do?

Take responsability for making your own choices based on the information myself and others have given you here.

 

The rollback worked for me but it would be a different story were the DPF to have been blocked, my car had done 128000 kms (80K miles) but I don't know how it had been driven in that time.

 

Post your autoscan because Varoom may have a different suggestion for you.

 

You live in Ile de France, I doubt that you will find anyone in this country to do an emissions rollback and if you did the likelyhood would be that the next time the vehicle was in a Skoda garage they would re-implement the "emissions fix"

42 minutes ago, J.R. said:

If you read my posting that uploaded while you were typing you will see that I reset mine to zero but it did nothing to change the problem, the ECU triggers on a calculated soot load and ignores the measured one, it does not seem to take any account of the oil ash volume whether it thinks it is full or has been told it is empty.

 

What worked for me and worked like a charm was the emissions rollback, my UK next door neighbour has an Octavia which he has never allowed to have the emissions fix, he had never heard the cooling fans running when he stopped, mine was doing it at the end of every journey less than 20 miles unless I drove straight back out again to let it complete.

 

Now with the rollback my car is like my neighbours.

thank you very much I don't know if I can find someone to do rollback  for me I'll look for it anyway .

No more options

 

If you are looking to rollback the EA189 fix that has been applied, then you will need a garage with ODIS-Engineering ideally, or a tuner that is friendly enough to help.

You will have a small hardware change that was fitted during the update to adjust the air flow, this will need to be removed (watch this video from 05m 58s) afterwards.

 

These are the available flash files

FL_03L906023NG_8817.frf <-- Pre EA189 (also known as Pre-NOx)

FL_03L906023NG_9594.frf <-- Pre EA189 (also known as Pre-NOx)

 

FL_03L906023NG_9970.frf <-- Beginning of the EA189 fixes

FL_03L906023NG_9971.frf

FL_03L906023NG_9972.frf

FL_03L906023NG_9978.frf <-- Your current version

FL_03L906023NG_9979.frf

FL_03L906023NG_9980.frf

FL_03L906023NG_9983.frf