Hi Guys & Girls
Without prejudice
Well, I've had a brilliant week dealing with more GPF issues on our cars which has been very productive.
Porsche have kindly fitted a modified GPF filter to 13 of our 718 cars, unfortunately they only agreed after we presented them with information that contradicted their diagnosis of the fault code P242F oil ash load exceeded.
From the start we have always said that a very low differential pressure sensor reading didnt go with a filter supposedly found to show a reading of 100% full.
On every vehicle we have dealt with and managed to get sight of page 42 of the Val report (vehicle analysis log) we found the same readings, very little pressure from the K251 reading.
We need to go back to the beginning when these cars were new, 2019.
We know from the information written on the internal memo that Porsche sent to their dealers in March this year, that they had been having issues with this oil ash load to high, back then.
Even the fault code P242F was the same, and they even came up with a modified filter to correct this issue, which was fitted to vehicles with a production date later than December 2019.
This is what they said in the last paragraph of the memo, explaining what to do if this fault code is present.
If no causes can be located and the above checks are all confirmed as OK then in some cases the OPF can be recovered therefore a OPF regeneration should be attempted to see if the OPF ash load is able to reset.If this has already been attempted or the ash load level does not reset when the OPF regeneration is attempted then the OPF should be replaced and the vehicle retested. The new OPFs (982254400AF) have been modified to prevent this issue. All vehicles with a production date later than December 2019 should already have the modified OPF and are therefore not relevant to this document. If there are any issues outside of this model year range or any further questions please submit a PRMS ticket or email directly.
This week I managed to have a conversation with a Technician working on one of our cars with the P242F oil ash exceeded code present.
He found my phone number on the forum, and was asking for help, after he had read lots of our posts on this subject.
He had already carried out a regeneration using his PWIS tester and managed to lower the oil ash reading, but he had soot and differential pressure sensor readings that didn't seem correct.
So the plan was to carry out another regeneration and see what happens.
After that regeneration and a road test, the ash came back at 52%.
He then carried out 2 more regenerations including road tests and he finally got a zero oil ash measured reading of zero.
I asked him then to go and have a look for the Adaptation page on PWIS, he found Adaptations and then Reset Adaptations Unfortunately has we suspected there was no facility to reset the adaptation on either the differential pressure sensor or the GPF.
He spent some time looking, but unfortunatly couldn't find anything at all, he sent me photos of the revelant pages to prove this.
So this clearly shows that these cars appear not to have the reset facility that they should have. And the only way the Dealers can reset the oil ash is by regeneration and lots of road testing which is also confirmed in the internal memo instruction.
It also means that Porsche Reading Technical must have known this, because they would have had the same issue in 2019 after they fitted the new modified filters to cars with this fault.
Its shocking how our owners have been treated by Porsche and their Dealers, they have both carried on with this miss diagnosis for far to long.
We have had 13 of our vehicles fitted with modified filters, and every one has come back with oil ash readings that defy any logic, from between 45% to 64%. Porsche now are saying this is exceptable.
Out of those 13 cars, 8 have been sold, because the owners had lost confidence with Porsche and their Dealers, regarding the other 5 cars we are still waiting for an answer from the Dealers and Porsche of what they are going to do next.
I have had dealings with many others with this fault, and the way they have all been treated is absolutely appalling.
Found this on the Internet
If a vehicle manufacturer replaces an emission part that doesn't fix the original fault, they may have to re-evaluate the vehicle's type-approval and comply with new emission standards, especially under the EU's type- approval regulations and in-service conformity rules. Manufacturers are required to ensure their vehicles' emissions remain within limits throughout their normal life.
So I think we have finally got to the reason why this oil ash problem is on these cars, its simply, the oil ash reset function on the cars we have seen, was not programed in from new.
If it had been, they would not have had to come up with another modified filter, and carry on this pretence that has caused a major loss of confidence with the Brand, Dealers and the financial implications this has caused along the way.
Over to you Porsche
Dave
