Good news Dan! I wonder if there’s any connection between the above and the fact that Paul reports that Porsche UK Reading technicians are now attending his dealer this Wednesday?
Jeff
Cayman 718 GPF Failure
- Thread starter Wrightrubber
- Start date
Good news Dan! I wonder if there’s any connection between the above and the fact that Paul reports that Porsche UK Reading technicians are now attending his dealer this Wednesday?
Jeff
I have been watching this thread from the start, no posts since the 5th. what as been the out come with this fiasco.
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
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
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
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
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
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
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
Attachments
David, thank you for all the work you continue to do on this subject. It is incredible, that after all these posts, the information that we now have and the detailed article on page 74 of the March Porsche Post, that we still have had no response from Porsche. I have just made an appeal in the general section of this site.
This is an attempt to reach a wider audience and gain some additional weight from other owners.
We must see this through to the end.
This is an attempt to reach a wider audience and gain some additional weight from other owners.
We must see this through to the end.
Well done for opening the discussion to a wider forum audience John. On the face of it, based upon Dave’s comments, this truly is a shameful and disgraceful stonewalling operation by Porsche UK and the higher echelons of the company.
Incidentally, the PP piece mentions Martin Werner as the lead Porsche engineer for the GPF programme. A pipe-dream of course, but wouldn’t it be great if Dave was able to liaise with him directly?
Hopefully perseverance will win the day … eventually! Keep up the excellent work Dave.
Jeff
Incidentally, the PP piece mentions Martin Werner as the lead Porsche engineer for the GPF programme. A pipe-dream of course, but wouldn’t it be great if Dave was able to liaise with him directly?
Hopefully perseverance will win the day … eventually! Keep up the excellent work Dave.
Jeff
Thanks John and Jeff for your kind words,
Without prejudice
We are not going to let Porsche abandon our 718 owners, we are not going to let these cars down. These cars are the first step to the Porsche experience, so they need to be right.
The lack of a possible software update should not spoil this experience.
We have done the hardware, GPF filters, we have changed the differential pressure sensors, we have even pulled 2 of our engines apart looking for possible oil consumption to confirm ASH buildup, we didnt find anything, we have even changed a DME.
There is no back pressure present when P242F presents itself, so what's left to check.
We know we can make changes in the software to stop our oil ash warning light coming on prematurely, so what is the problem.
The more we delay in fixing this, the more Porsche owners are not only loosing confidence in their dealers, but also in the Brand.
We need Porsche Customer Care to support their dealers when this fault shows itself, and confirm to their customers that support is available before they deliver the wrong diagnosis, they do not a new GPF filter to fix this fault.
Telling their customers it's 9K to fix this fault, and when asked what's caused the problem, and the reply is you have, is totally unacceptable and has to stop.
Today I went to a Porsche event at the Harewood Hill Climb, and carried out a AOS vacuum check on a 2023 Cayman, we have done this check on several cars and found that they read around 30 to 35 inches of water (inH20), engine warm, on tickover.
We can use this information going forward, so these very important Emission devices can be checked anytime and very quickly.
I took a video showing the reading, unfortunately the file was to large to send.
If anyone needs to see the video, just contact me and I can send it on.
Dave
Without prejudice
We are not going to let Porsche abandon our 718 owners, we are not going to let these cars down. These cars are the first step to the Porsche experience, so they need to be right.
The lack of a possible software update should not spoil this experience.
We have done the hardware, GPF filters, we have changed the differential pressure sensors, we have even pulled 2 of our engines apart looking for possible oil consumption to confirm ASH buildup, we didnt find anything, we have even changed a DME.
There is no back pressure present when P242F presents itself, so what's left to check.
We know we can make changes in the software to stop our oil ash warning light coming on prematurely, so what is the problem.
The more we delay in fixing this, the more Porsche owners are not only loosing confidence in their dealers, but also in the Brand.
We need Porsche Customer Care to support their dealers when this fault shows itself, and confirm to their customers that support is available before they deliver the wrong diagnosis, they do not a new GPF filter to fix this fault.
Telling their customers it's 9K to fix this fault, and when asked what's caused the problem, and the reply is you have, is totally unacceptable and has to stop.
Today I went to a Porsche event at the Harewood Hill Climb, and carried out a AOS vacuum check on a 2023 Cayman, we have done this check on several cars and found that they read around 30 to 35 inches of water (inH20), engine warm, on tickover.
We can use this information going forward, so these very important Emission devices can be checked anytime and very quickly.
I took a video showing the reading, unfortunately the file was to large to send.
If anyone needs to see the video, just contact me and I can send it on.
Dave
Hi Jimmy p
Without prejudice
Unfortunately we have had a few Boxsters with this issue, but it's mainly Cayman, we have also had two 991.2 2019 cars as well.
One of the 991.2 cars is going back for the oil ash check shortly, after having one of its GPF filters replaced earlier this year, the car had only covered 12K.
I would encourage anyone with a 2019 petrol car to have the oil ash % level checked, it should be part of its service schedule.
Will keep you all updated as we go along.
Regards
Dave
Without prejudice
Unfortunately we have had a few Boxsters with this issue, but it's mainly Cayman, we have also had two 991.2 2019 cars as well.
One of the 991.2 cars is going back for the oil ash check shortly, after having one of its GPF filters replaced earlier this year, the car had only covered 12K.
I would encourage anyone with a 2019 petrol car to have the oil ash % level checked, it should be part of its service schedule.
Will keep you all updated as we go along.
Regards
Dave
Hi John,
Not sure if you are aware but I posted something similar in the general section over a month ago suggesting to owners of post 2019 cars (macan,911,718) owners to ask for the GPF to be checked at there next service.
I also included a link to the cayman post as you have.
After 2 weeks I bumped it back to the top and there was no comments or low views.
I believe this is because this section can only be seen by members unfortunately were as the cayman forum can be read and seen by the general public/ non member owner who has this issue and does a google search.
Personally I believe this is where most of our views are generated from..
With your contacts at the club could the general settings be changed to allow non members to see ?
The alternative is we post on the model forums as I expect these can be seen by the general viewer..
Posts relating to the 718 GPF issue and GPF Val testing at OPC services uploaded on both the 992 and macan forums..
Hi Guys & Girls
Without prejudice
Another week of frustrating phone calls and lots of WhatsApp messages to owners providing information to try and convince their Porsche Dealers that they need to confirm that the actual differential pressure sensor information present on two of our latest cars is correct.
The first car had 1.41 hPa, and the other one had .75 hPa.
These readings were both from cars that have an oil ash level of 100%, and the dealers are saying the GPF filters need replacing, and at the moment are not covered by Porsche.
After two years of dealing with this issue, the dealers are still maintaining that the GPF filters are definitely blocked with ASH and need a replacement part.
They are still refusing our requests of doing a manual back pressure check to confirm the GPF is actually blocked.
They are definitely ignoring the differential pressure sensor readings on the GPF report, that are showing no pressure at all.
Instead of contacting Porsche Technical Reading to discuss this issue, they would rather upset our owners, and asking for 9K to supposedly fix the issue. They then embarrass themselves by not being able to answer the question, why is this fault happening, and if they are pushed for more detailed information, GPF reports etc, they finally start to get things moving with Customer Care, Technical, and the Warranty Departments.
And usually a courtesy car is not always available to any customer who dares to challenge the dealer or Porsche.
Ash build up in the GPF directly affects fuel consumption through two pathways: (1) increased exhaust flow restriction and backpressure, and (2) increased regeneration frequency, through a reduction in filter soot storage capacity.
Furthermore, the ash may also reduce the regeneration efficiency in catalyzed systems, requiring an increased reliance on active regeneration or higher temperature operation for successful passive soot oxidation.
Now if you remember I have asked every owner with this P242F oil ash load exceeded fault code, have you ever seen a soot regeneration message on your car.
Never has always been the answer, surely out of all these 6 year old cars somebody should have seen this soot regeneration light come up on the dashboard.
Unless there has always been a fault right from the start, bearing in mind we have written confirmation from Porsche admitting that modified GPF filters part no 982 254 400AF were introduced in production on December 2019 cars onwards.
We do know that if you see a soot readings of around 50% to 60% in both the Measured and Calculated data, the soot regeneration message will appear on the dashboard.
This only happened on a Cayman that had a GPF clean with a cleaner that completely contaminated the filter and put on the soot warning light and message.
We have photos and 2 fault codes to back this up.
So to sum up, Porsche are still saying these Exhausts are blocked, and they need replacing, yet if they are blocked, why isn't the soot warning light coming on, it should be, as the space in the filter is decreasing fast, so more active regenerations will be needed, and the back pressure should be increasing to.
And yet we have not managed in nearly 2 years, to get a Dealer to do a simple back pressure test on any of our cars
But the soot regeneration light and message, isn't coming on, these cars are running fine, we fit new filters, which make no difference at all, new differential pressure sensors, new AOS, and even engine strip downs looking for internal oil consumption to substantiate excessive oil ash build up.
Even a new DME has been fitted, in a bid to re set the oil ash % level in our cars, and that failed to fix the fault.
It should be really easy to reset the soot and the oil ash levels to zero once a new GPF has been fitted.
WHY CAN'T THIS SIMPLE TASK BE DONE
An algorithm is used to measure ash content in a GPF Filter and it typically relies on a combination of sensor data, historical performance, and predictive models to estimate ash accumulation. This process doesn't directly "measure" ash in the sense of a lab experiment, but rather uses indirect indicators to infer its presence and quantity.
The differential pressure sensor should control the soot levels and regeneration process in our cars.
HOW LONG IS THIS GOING TO GO ON
Sorry to go on, but this is becoming a bigger issue on these cars, bearing in mind all these new parts that have been fitted, and the fault as not been fixed yet.
WHATS WRONG WITH LOOKING AT THE SOFTWARE.
I have been asked many times for information on diagnostic testers that can read the Oil Ash % levels on our cars.
Owners of these cars are obviously worried if they are going to have the same issues they have seen on our forum.
We are currently on 56 K views on this subject on our forum at the moment.
I would say to any owner of a vehicle with a petrol GPF fitted, to get their Porsche Dealer, or independent Garage to do this simple check and put their mind at rest.
Regards
Dave
Without prejudice
Another week of frustrating phone calls and lots of WhatsApp messages to owners providing information to try and convince their Porsche Dealers that they need to confirm that the actual differential pressure sensor information present on two of our latest cars is correct.
The first car had 1.41 hPa, and the other one had .75 hPa.
These readings were both from cars that have an oil ash level of 100%, and the dealers are saying the GPF filters need replacing, and at the moment are not covered by Porsche.
After two years of dealing with this issue, the dealers are still maintaining that the GPF filters are definitely blocked with ASH and need a replacement part.
They are still refusing our requests of doing a manual back pressure check to confirm the GPF is actually blocked.
They are definitely ignoring the differential pressure sensor readings on the GPF report, that are showing no pressure at all.
Instead of contacting Porsche Technical Reading to discuss this issue, they would rather upset our owners, and asking for 9K to supposedly fix the issue. They then embarrass themselves by not being able to answer the question, why is this fault happening, and if they are pushed for more detailed information, GPF reports etc, they finally start to get things moving with Customer Care, Technical, and the Warranty Departments.
And usually a courtesy car is not always available to any customer who dares to challenge the dealer or Porsche.
Ash build up in the GPF directly affects fuel consumption through two pathways: (1) increased exhaust flow restriction and backpressure, and (2) increased regeneration frequency, through a reduction in filter soot storage capacity.
Furthermore, the ash may also reduce the regeneration efficiency in catalyzed systems, requiring an increased reliance on active regeneration or higher temperature operation for successful passive soot oxidation.
Now if you remember I have asked every owner with this P242F oil ash load exceeded fault code, have you ever seen a soot regeneration message on your car.
Never has always been the answer, surely out of all these 6 year old cars somebody should have seen this soot regeneration light come up on the dashboard.
Unless there has always been a fault right from the start, bearing in mind we have written confirmation from Porsche admitting that modified GPF filters part no 982 254 400AF were introduced in production on December 2019 cars onwards.
We do know that if you see a soot readings of around 50% to 60% in both the Measured and Calculated data, the soot regeneration message will appear on the dashboard.
This only happened on a Cayman that had a GPF clean with a cleaner that completely contaminated the filter and put on the soot warning light and message.
We have photos and 2 fault codes to back this up.
So to sum up, Porsche are still saying these Exhausts are blocked, and they need replacing, yet if they are blocked, why isn't the soot warning light coming on, it should be, as the space in the filter is decreasing fast, so more active regenerations will be needed, and the back pressure should be increasing to.
And yet we have not managed in nearly 2 years, to get a Dealer to do a simple back pressure test on any of our cars
But the soot regeneration light and message, isn't coming on, these cars are running fine, we fit new filters, which make no difference at all, new differential pressure sensors, new AOS, and even engine strip downs looking for internal oil consumption to substantiate excessive oil ash build up.
Even a new DME has been fitted, in a bid to re set the oil ash % level in our cars, and that failed to fix the fault.
It should be really easy to reset the soot and the oil ash levels to zero once a new GPF has been fitted.
WHY CAN'T THIS SIMPLE TASK BE DONE
An algorithm is used to measure ash content in a GPF Filter and it typically relies on a combination of sensor data, historical performance, and predictive models to estimate ash accumulation. This process doesn't directly "measure" ash in the sense of a lab experiment, but rather uses indirect indicators to infer its presence and quantity.
The differential pressure sensor should control the soot levels and regeneration process in our cars.
HOW LONG IS THIS GOING TO GO ON
Sorry to go on, but this is becoming a bigger issue on these cars, bearing in mind all these new parts that have been fitted, and the fault as not been fixed yet.
WHATS WRONG WITH LOOKING AT THE SOFTWARE.
I have been asked many times for information on diagnostic testers that can read the Oil Ash % levels on our cars.
Owners of these cars are obviously worried if they are going to have the same issues they have seen on our forum.
We are currently on 56 K views on this subject on our forum at the moment.
I would say to any owner of a vehicle with a petrol GPF fitted, to get their Porsche Dealer, or independent Garage to do this simple check and put their mind at rest.
Regards
Dave
Last edited:
Hi, it's me again,
Without prejudice
Look what came through today
www.thesun.co.uk
Without prejudice
Look what came through today
Porsche discontinues two iconic models and replaces them both with EVs
PORSCHE has confirmed it will axe two of its most iconic sports cars—the petrol-powered 718 Boxster and 718 Cayman—by the end of this year, paving the way for fully electric replacements. The annou…
www.thesun.co.uk
Hi its me again,
Sorry but we need to keep the pressure on, pardon my pun
Without prejudice
This is a question that the dealers never answer.
Why when my GPF filter is blocked with ASH and it needs replacing, have I not seen this soot warning message on my dashboard.
Afterall with pressure in my exhaust due to the blockage, this warning message should be triggered.
The pressure is monitored by the differential pressure sensor, and it does not care if it's caused by Ash or Soot, pressure is pressure.
To anybody out there who is having Gpf issues, and your Dealer is telling you, your GPF needs replacing, please ask your Dealer this question.
Enclose a photo of the soot warning message you have never seen.
Regards
Dave
Sorry but we need to keep the pressure on, pardon my pun
Without prejudice
This is a question that the dealers never answer.
Why when my GPF filter is blocked with ASH and it needs replacing, have I not seen this soot warning message on my dashboard.
Afterall with pressure in my exhaust due to the blockage, this warning message should be triggered.
The pressure is monitored by the differential pressure sensor, and it does not care if it's caused by Ash or Soot, pressure is pressure.
To anybody out there who is having Gpf issues, and your Dealer is telling you, your GPF needs replacing, please ask your Dealer this question.
Enclose a photo of the soot warning message you have never seen.
Regards
Dave
Attachments
I follow this thread with great interest though I have a simple 987.2.
Tenacity will win, hound everyone you can who will listen.
I hope the Auto Express will pick it up.
Really not sure Porsche deserve any consideration here, the fault is clear, there lack of action clear too; must be a way through all this stone wall action,
just poor Customer Care.
They have taken the money, and to hell with the Customer.
I presume the Club have not made any progress?
Tenacity will win, hound everyone you can who will listen.
I hope the Auto Express will pick it up.
Really not sure Porsche deserve any consideration here, the fault is clear, there lack of action clear too; must be a way through all this stone wall action,
just poor Customer Care.
They have taken the money, and to hell with the Customer.
I presume the Club have not made any progress?
Posts made and opinions expressed are those of the individual forum members
Use of the Forum is subject to the Terms and Conditions
