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Cayman 718 GPF Failure

Hi Glenn

Without Prejudice

We'll its been a while since I last posted, but we have been very busy with lots of GPF related issues, which are not all documented on this post.

Paul's car is still in the workshop, still not fixed as yet.

We also had a guy last week that had put down a deposit on a 2019 Cayman, he rang me reference our forum posts, we asked for the GPF report to check the data before he collected the car.

Unfortunately that was not forthcoming from the Dealer, so he cancelled purchasing car.

Last night I was contacted by another owner that was told by his Dealer he needed a new GPF filter, and it wasn't covered under warranty.

We are waiting for the GPF report to be sent to us.

We have another one of our cars going back to the Dealer to re check the oil ash reading %.

It had a new modified GPF filter 982 254 400AF fitted in Autumn last year, it was rechecked a few months ago and it was already showing 47%, same as Paul's.

Will up date you all, when the car goes in.

When is all this going to stop, 2 years battling with the Dealers and Porsche over this issue.

THESE FILTERS ARE NOT FULL OF ASH, AND THEY NEVER HAVE BEEN.

We have asked every dealer we have been involved with, to carry out a basic back pressure check using either a manometer or a pressure gauge, to confirm the ridiculously low differential pressure sensor readings we always see when the DTC code P242F (oil ash load exceeded) is present.

QUESS WHAT, THEY WILL NOT DO IT AND SHOW US THE READINGS.

And to make matters worse if we press the point about this extra test, we have been told to take the car somewhere else.

If we get any more dealers telling our owners that their GPF filters are blocked with ash, and it needs replacing, without a back pressure check being carried out, then we will post out the details of the Dealer involved and start a possible case against them for miss diagnosis.

I would like you to have a look at this video its reference our DTC code P242F, sorry its takes a bit of time.

It's all about a mileage limit set by the manufacturer on a DPF filter, which says the filter needs replacing after a certain milage covered.

But when the DPF is checked for a high differential pressure reading, it doesn't have high pressure, to confirm the filter is blocked.

SOUNDS FAMILIAR

The DPF is reset back, didn't need cleaning or replacing, or lots of diagnostic time spent, or even a regeneration, and certainly no road testing to try and clear the code.

WHY CAN'T OUR DEALERS DO THIS ON OUR CARS

We now have 54,000 views on this subject.




Regards

Dave
 
Hi, it's me again

Without Prejudice

Sorry but I need to get this off my chest.

I have spent the best part of today trying to help 2 owners of 2019 718 Caymans that have been told they need to replace their GPF filters, and no, Porsche warranty are not paying.

We have been trying to get the Dealers to have another look at the differential pressure sensor readings on both of these cars.

The readings are so low, just about non existent, but yet the Dealers are telling us the GPF is blocked 100% with ASH, which cannot be right.

Has you know I have had sight of the letter Oliver Hayward from Porsche sent out to all the Dealers on the 3rd March just gone.

This letter clearly explains to the Porsche Service staff what to do if a vehicle comes in with the fault code P242F ash load to high.

This is the list of checks Oliver asked the Dealers to carry out.

Several causes of the high ash load have been found across various vehicles therefore to prevent repeat
issues it is important to check all possible causes of high ash load before proceeding with any repair. These
include completing cylinder leakage checks to ensure oil is not entering the cylinder, checks of the intake
and exhaust for signs of excessive oil build up which could be a result of a leak from the oil separators,
turbocharger or valve stem seals. It is also important to check the operation of the turbocharger actuator to
ensure this is functioning correctly and check the OPF differential pressure senser for correct functionality
ensuring the pipes to the differential pressure sensor are not blocked or restricted.

It seems to me that the Dealers are clearly not following his advice with regards to the functionality of the differential pressure sensor.

Because if they did they would surley question why on a supposedly blocked GPF, is the differential pressure sensor reading so low.

This why we need to check that the sensor reading is correct, and the only way you can do this is by a manual pressure check of the GPF to confirm this reading from the car is correct.

So why are the dealers not carrying out Olivers instructions, we can forgive him for not mentioning a back pressure check in his list of checks.

But remember these Porsche technicians see these low differential pressure sensor readings ever time a car comes in with this fault, and it's clearly recorded on page 42 of the Val report.

And you would expect this to be reported back to Porsche Reading Technical on every occasion, I would ask, is it being reported back, if it is, what's going on, because they can also see this data too.

This information would confirm that the GPF was not blocked and therefore didn't need replacing, and a quick look at the tailpipe would confirm that if no soot was present, this is another indication that the GPF was not the fault.

So why is this not happening, when we now have proof on lots of our cars recently fitted with new modified filters that it hasn't fixed the oil ash problem and it's coming back quicker then ever.

We are not wrong on insisting further diagnostic checks should be carried to support the replacement of a very expensive part on our cars.

We need more help and support from our dealers, because it's not our owners fault that are Dealers appear to be miss diagnosing this fault on our cars.

Sorry the OPF is a GPF


Regards

Dave
 
Hi, me again

Sorry forgot to send you this short video clip, showing
a manometer being used to check for exhaust back pressure.

Very simple test, you can buy a manometer on Amazon, usually around £60.00, and you can also use it to check your AOS vacuum.


Regards

Dave
 
Excellent Dave, it seems so simple to check back pressure, so why do they constantly refuse to check it? Maybe because the results will show how incompetent they have been throughout this whole process!
Regards
Mark
 
Hi Mark,

Without prejudice

Yes I agree, I think they have allowed this problem to get out of hand, fitting expensive exhaust parts that we said didn't need removing based on the differential pressure sensor readings.

And to confirm this, look at all our cars that have had these modified filters fitted, that have gone back to the dealers with the same fault on the oil ash % reading, after only a small mileage covered.

I recived last night this post from an owner with a 718, on the 718 Forum regarding our campaign to try and fix these cars.

Thank you for the latest update Dave. I've been following this thread (and the one on PCGB) since the start. I'm disappointed, but not entirely surprised at the resistance of Porsche to engage properly, accept the evidence you've painstakingly pulled together, and do the right thing.

I'm very grateful for your determination and persistence. As the owner of an early 2019 BGTS, I'm hoping there is a solution before I encounter the problem. I'd be happier if I knew that an ODB2 diagnostic tool like Thinkdiag, for example, could read the ash levels & initiate a GPF reset, to avoid the need to fight my local Porsche dealer in Reading, who have been less then helpful with other issues in the past. In the meantime, I'm keeping my fingers crossed and awaiting further updates from those that are already in the battle. 🤞

This was my reply back to him.

What we need to do is get our owners with GPF cars to make an appointment with their dealers and ask them to check the GPF data on their cars to make sure the GPF system is functioning correctly in view of all the trouble we have been having.

This simple check would hopefully show us it's only model year 2019 that's affected, and if this was proven to be the case, we could then look at what's different on the later cars, this may help Porsche fix this issue quicker.

The GPF report page 42 shows all the information we need and shows the oil ash measured value, that's causing all the trouble.

Afterall the Porsche Dealers classed these filters as a Service consumable to get out of replacing them through the extended warranty.

We know that the GPF is now written in as an excluded part in the new Warranty policies, it wasn't before, so it should have been covered.

So if they say the GPF filter is the same as all filters, then they have to except that the GPF filter needs to be checked periodically has a service item.

It's important that these emmision devices on all motor vehicles are checked to make sure they are doing the job they were designed to do.

Iam sure Porsche Reading would be only to pleased to help us with our investigations.

Regarding the Thinkdiag we need someone with one to try it on one of our cars.

Kind regards
Dave
 
Hi its me again,

Without prejudice

I would like to personally thank all the people that are viewing our 718 GPF Forum, over the last few posts we have picked up a further 1000 views, we are at 55K has of today.

We really need your support on this and this confirms you are with us.

IF WE COULD TURN THESE VIEWS INTO DEALER VISITS FOR A GPF OIL / ASH CONDICTION CHECK IT WOULD BE GREAT.

Once again, thankyou all for your support

Dave
 

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