It can be for NUMEROUS reasons, telling the OP about DPF is almost absurd.
Especially that DPF issue can be triggered by numerous root causes, and that it's quite unlikely with 40K (unless the car is hardly used and unless it's cheated meter*).
*And then again it would depend on how the DPF regeneration is triggered and how the car was used.
It's either let the mechanics check (DEFINITELY NOT the preferred option) or have a first diagnostic using OBD2 device (preferred option).
Additionally your advice about DPF is dangerous because you assume that "force regeneration" is the solution and "being too full" is the main symptom, something which can cause anyone to waste thousands of CHF. Unless you identify the real root cause of exhaust problem, please do not assume it's "DPF".
I said "unlikely", not "excluded" or "impossible".
And your item is full of bad information:
"However, in order to avoid clogging, so-called regeneration journeys must be carried out at regular intervals.
Not true, it depends on HOW the regeneration is triggered.
This means a longer tour at medium speeds where the temperature in the exhaust gas rises to at least 500 to 600 degrees,
Not true.
so that the filter is "boosted" again -
Not true, if anything, regeneration help destroy (burn) the particules and does not "boost" anything, but clears the DPF and avoid sooth depositing everywhere else back to EGR valve and eventually engine.
see the operating instructions for each diesel.
Not true, not always written or explained.
A warning light indicates the driver when such a regeneration ride is due again."
Not true, some cars have NO warning, no information even when it's going bad with DPF and sooth accumulating.
Your whole post is "almost" absurd......no one is going to waste thousands of CHF by having a notion, based on advice on a forum that their DPF may be clogged.....they might waste plenty of time messing with an OBD2 device when they can simply ask a garage to do this for them, especially given that they clearly don't know too much about car mechanics....DPF problems are actually quite common in diesel VWs when they are not driven at relatively high revs over a constant period of 15 minutes or so on a frequent basis.
This was just a suggestion anyway, and I sure the OP has more intelligence than you seem to credit him/her with in interpreting it as such.
OP, let us know if you find out what the problem is/was .... it would be interesting to know....I hope it all turns out okay for you.
100% Assumption that the garage (or mechanic) "knows better".
In my practical experiences in Switzerland:
1) It's not their interest to fix quickly and many are not hesitating to pretend
2) They have very limited experience with fixing, especially in Switzerland.
3) Seeing their labor cost is often cheaper to quickly buy new part and replace it as opposed to troubleshooting, hence the additional loss of experience.
4) You might end up replacing DPF based on mechanic "advice", which will only delay your issue and adding to the costs.
5) Going to garage without information is like a sheep going to slaughterhouse. It won't end well (for the wallet or the sheep).
6) About the OBD2 code, clearly you also don't know much about troubleshooting and diagnosing, because they don't need to know or understand it- They can copy paste the error for more advanced and experienced people to give a first diagnostic, as a "start".
7) I doubt the OP has such troubleshooting intelligence if not able to understand a basic engine warning. Feel free to think otherwise. I know how the garage usually handle such pigeo...persons.
8) You don't lead an investigation based on a theory and then investigate to prove it (ie check DPF). You base it on facts and then lead the investigation.
The buying public didn't care 2 hoots when then were found to have bribed officials - so why would they care about lying?
VW make perfectly adequate diesels - even if you take out the lying part. Their cars are well made, relatively good value and are good long term value propositions (even after the lying).
They question should be more like "Why did anyone expect their long term sales to be heavily impacted? And who would gobble up that market share?"
1) I have no money left, I had to repair my car in Swiss garages lately.
2) Last week I opened the car, sit on driver side, turn on engine, and there was an icon on dashboard showing someone being strangled by a sort of diagonal belt. Worse, some alarm went off and it kept beeping.
No need to say I stopped the engine and escaped, so I never managed to reach pharmacy to renew the meds.
I think it's not just about how adequate are the cars but the company got caught in an obvious lie, making adds about Add Blue technology at the same time as they were tweaking the diesel software.
People in Europe complain about the lack of democracy and representativeness by politicians and voting with your wallet would have been a way to act.
That's what I do anyway, never again one franc to VW, Audi, Skoda etc...
you realise VW isn't / wasn't the only company caught? and that ALL the manufactures do this kind of shit? they make the cars to pass the tests, maybe read up on some of the ways they get a car higher ratings on the ncap tests
if the governments really cared they would put together some proper real world test, to blame the manufacturers for making the cars pass a set of standard ridiculous tests is pretty short sighted.
I don't agree, everybody says this but VW was the only one caught so far. There were rumors about other companies but to my knowledge, VW are the only ones.