Cayman 718 GPF Failure

[Cyclemotor1958]

Hi Guys & Girls

Without prejudice

To continue on with our challenge to Porsche Technical for them to confirm to us that our cars have a manual adaptation facility on PWIS that would re set the oil ash reading to zero.

Found this VCDS (VW) video on YouTube that shows how easy it could be, its on a DPF, but its the same on a GPF car.

This is what we would expect to see on our cars, or something very similar.

Both DPF and GPF vehicles have to have an adaptation capability in order to reset the ECU, when either the filters or the differential pressure sensors are replaced in service.

Hopefully this week we will get confirmation, either from the Dealers, or maybe Porsche Technical at Reading.

Dave

 

[Cyclemotor1958]

Hi Guys & Girls

Without prejudice

I never stop thinking about this GPF emission control issue on our cars, and the phone never stops ringing, its frustrating that after more than 2.5 years we have still no answers from Porsche or their dealers on why its taking so long to fix these cars.

We have so many questions to ask Porsche Technical, so let's go.

1. Why when, we have asked the Dealers to check for back pressure on the cars that have been diagnosed with a blocked GPF, have they always refused to do it.

2. Why have the Dealers and Porsche Technical ignored the very low differential pressure sensor readings on all the cars with a oil ash filter reading at 100%.

3. Why when we see a GPF report showing the oil ash at 100% do we never see any significant soot values, bearing in mind if the filter's blocked with ASH, weres the soot going to go.

4. Why if the filter is blocked 100% and needs changing, do we not see any other DTC codes, a blocked GPF would certainly leave other running codes. For a start, if the exhaust is blocked you would expect to see, running and performance issues surely.

5. Why when a new filter is fitted, do we get a zero oil ash % reading, then within a few hundred miles it comes back with an average oil ash % reading of between 48 and 58%, we had a reading of 64% on one of the first cars we looked at a few years ago.

6. Why are the Dealers carrying out regenerations and miles and miles of road testing after these new modified filters have been fitted.

7. Why is the modified GPF filter, part no 982 254 400AF not fixing these cars, the internal memo sent out in March this year said it would.

8. Why are the Dealers still telling our owners that driving style is the reason why these filters need changing, we have had 2 in the last 2 weeks.

8. Why after all the parts that had been fitted to Pauls old car, did we have a situation where Porsche and the Dealer couldn't get his oil ash level % down to zero permanently, bearing in mind it never left the garage. And they bought the car back off him.

9. Why can Ash be here one minute and then gone the next, if its real ash.

10. Why now after a new modified GPF filter is fitted, can the Dealers tell us that a reading of 54% is acceptable, after such a short time, and no further work will be carried out.

11. Why will Dealers not answer our questions regarding the possible manual adaptation of the differential pressure sensor, and the GPF oil ash function on our cars, do they have it, or not, thats all we are asking.

We will get confirmation very soon regarding the real reason why the Dealers are struggling to reset the oil ash levels.

Any feedback from this post would be greatly appreciated

Dave

 

[911hillclimber]

Written in that way it reads to me the Dealers have been told what to do or not to do by Porsche, so they are following the instructions.
If this thought of mine is true then the issue is simply being ignored by Porsche and the dealers are tied.

Doubt the dealers will break silence, and only Porsche in the UK or better still Germany can answer those very relative and reasonable questions you have written.
Do Porsche UK have the ability to give answers? What level is the UK tech team or are they the group who are not allowed to face the customer?

There must surely be an open door for this in Porsche UK?

 

[Scrounger]

Take those questions to the motoring press and get them to ask Porsche. It's really frustrating that the same questions are being asked and the same silence comes from the manufacturer. If you want answers to questions then the only option is pressure by full exposure to the general public.

Porsche are quite literally on their arse at the minute (just look at discounts on new 911) and I think that if a scandal like this came to light it would make a big dent in their reputation to such end that they'd rather solve it quickly. It does make me wonder though if PGB are actually passing these issues onto the mother ship.

Dan

 

[Cyclemotor1958]

Hi Guys

Without prejudice

Thanks for the feedback, we are now at a point where we have to prove 100% that the reason for the Dealers struggling to sort this out, is the the inability to perform a correct reset of these values.

Your right the Dealers have never been in a position to tell us the truth even when the internal memo sent out in March, dropped in their inbox.

But they are still accountable, they have technicians and Managers and Senior Managers that know what the issue is, but has long as Porsche are paying them valuable workshop hours why would they go against them.

It seems after all this time they would rather embarase themselves, with pathetic reasons for blaming the owners of these cars for this problem, using driving style has the cause of this fault, and they are still clearly agreeing with Porsche Technicals advice and guidance.

Along time ago we sent an email to Porsche Technical Reading requesting to go down to see them to see if they could answer our questions regarding the soot regeneration warning light not coming on, and why the ash had come back on our new modified filter.

We where told that they where not customer facing and we should go back to the dealer who fitted the modified GPF.

The reason we wanted to speak to them was because the Dealer concerned said if the new modified filter blocked up again the owner would have to pay, the ash level increased twice in 1500 miles and it reached 55%.

Because of all this stress the owner Mark sold his car, and he has been behind me on this journey right from the start. In fact he was the first owner with this fault, that I convinced Porsche
that this fault wasn't the customers fault, and they paid for the filter.

This is becoming a major miss diagnosis of an emission control function on their cars. They are quite happy to loose valuable customers, along with reputation, and between them they are affecting the brilliant technical advances that have been made on these 718 cars, and thats why people bought them, love them, and in most cases Ive seen, never ever wanted to sell them.

Our next step is to speak to the people out there in the Vehicle Emission World and ask them if they can get our questions to Porsche answered, before this situation gets even worse.

Somebody somewhere is responsible for this ridiculous situation we are in with these cars, mistakes happen its a fact of life, most things can be fixed, reputation can be rebuilt, its time the people responsible stood up and became accountable.

Fingers crossed

Dave, and all the people out there, affected by this issue.

 

[Wrightrubber]

Thanks Dave, I really don't know what I would have done without your help, I was facing a large bill and the dealership and Porsche Technical couldn't be less helpful if they tried, they had taken my £50K and didn't want to know!
I was getting nowhere with either of them so I contacted Porsche in Germany and guess what?? they didn't want to know either, they said because I had purchased the car in the UK I had to speak to Porsche GB effectively washing their hands of it.
I then had to pay a third to get the GPF replaced, but after Dave's intervention they gave me my money back...why would they do that? I believe they did that because they knew of the problem all along!!!
As Dan said Porsche are on their arse at the minute and i'm not surprised, they are such an arrogant company that don't respect or treat their customers well, what goes around comes around!!
I really believe Dave will get to the bottom of this and it will get sorted, keep up the good work!
Regards
Mark