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Cayman 718 GPF Failure

As someone who has battled with AOS issues on my 987.2 that video is very good, simple, and clear.
Thanks for posting, never seen it before.
How is the Porsche Motorsport AOS design improved over standard fitment?
 
Dave

Referring back to my post from Sunday, is there any correlation between low mileage/ low usage over time and the GPF failures?

Dan.
 
As someone who has battled with AOS issues on my 987.2 that video is very good, simple, and clear.
Thanks for posting, never seen it before.
How is the Porsche Motorsport AOS design improved over standard fitment?

See the link in my post #156 above Graham.

Unfortunately it appears that it’s available only for the M96 engine and not the later 9A1 DFI engine used in our cars.

Jeff
 
Hi all,

I contacted Dave yesterday in regards to a potential issue on a 2.5 Boxster GTS, engine light came on no warning sign as indicated in the manual.
Common theme of 2019, I purchased the car with 11,500 miles approx 3 months ago from a main dealer under warranty have had to wait 3 weeks for a slot to drop the car off for them to check. Was informed it’s okay to drive the light may go out but still bring it in for us to check. No loss of power.
Fingers crossed it’s something else but given the comman themes in this post it’s looking like I to could be stuffing from this issue. I informed Dave I will keep him posted once the car has been inspected.,

PaulIMG_1063.jpeg
 
It’s a generic engine fault warning message Paul, so isn’t necessarily GPF related. Unfortunately you’ll have to wait until the dealer hooks up the PIWIS to get the diagnosis. Fingers crossed it’s something unrelated, and will be covered if you have the Extended Warranty.

Today I was discussing this matter with the Cambridge dealership Assistant Service Manager who said that they’ve had a car with a failed GPF which was attributed to the use of the incorrect oil [low ash spec 0W-40 is required]. I said that if the car had been dealer serviced this shouldn’t have happened, but he made the point that it’s possible that the owner used the incorrect oil to top-up. I’m surprised that even a relatively small quantity of oil would cause a problem, and it still doesn’t explain why no-one seems to get the regeneration warning message so that action can be taken before GPF failure occurs.

Jeff
 
Hi Jeff

Your posting above ticks the box to one of my theories behind the GPF failures including low usage which doesn't allow the GPF to do a full regen. It also explains why Porsche have changed the grade of oil (twice for GT cars) since 2020. Maybe their engineers are aware of the issue and have diagnosed the issue (or one of) as being the grade of oil.

Dan
 
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That seems to be a well-documented reason for diesel filter failures Dan, and there’s no reason to think that the same doesn’t apply to GPFs even though petrol engines have much hotter exhaust gasses than diesels, so you would think that filter clogging should be less of an issue; clearly not!

Indeed, if Porsche engineers are re-specifying engine oil then clearly they’re aware of - and reacting to - an actual or potential problem, and you would think that Porsche would do the decent thing and recognise a potential oil spec issue with the earlier cars and make a generous contribution to GPF replacement? Even better, include GPF replacement in the Extended Warranty.

Jeff
 
2019 - 2.5 GTS

Hi All,

It was confirmed nearly 2 weeks ago that the GPF on my car is full to 100% and I would need to pay £7500 to rectify the issue after 1500 miles of driving and 4-5 months of ownership.
Case has been raised with Porsche UK still awaiting reply after nearly 2 weeks. Lots of questions raised with OPC very few answers so far and definitely getting the feeling all technical questions related to root cause and warning lights being ignored. Although I have requested the VAL report from both the presale and recent inspection I have been informed that Porsche Uk are informing dealerships that they are not permitted to release the full VAL report.
Again like others no stage warning lights as per owner manual which I believe no body has witnessed…
Interestingly when the car went through the presale the GPF was 76% full and no warning light was present.. still awaiting an explanation from Porsche Uk and OPC..

In summary after 11 years of Porsche ownership very disappointed and my confidence in the brand has been knocked for six..

David and I are now talking daily like many others to try and get some answers and a resolution for both current and future owners..
Will keep you all posted ..
 
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Question -
Given this also appears to be effecting Boxsters should we request the thread name being changed.
May help us build a full case on vehicles affected to date ?
 
I look at both sections of the 'Boxster/Cayman' cars on this forum as they are so similar as cars.
This situation is bad imho, and I too would not buy another modern Porsche due to poor design and materials based on my 6 years with my 987.2 Boxster.

I do hope Porsche and OPC will resolve this lot asap, but obvious slow responses do not bode well, but fingers are crossed for anyone facing this.
 
I still have the gut feeling feeling that the GPF failure could be the result of lack of use or is of the wrong oil for the GPF, not necessarily the fault of the owner but it seems strange that Porsche have changed the oil grade twice since 2020. Could the use of regular oil, not A40 or C40 and in GT cars the now GT oil which are all low sulphur/carbon be the cause?

Dan
 
Would those changes be sent out as a Service Notification to all owners so you could do something about it asap?

Also, surely this effect would have appeared in product testing, ie lots of 'city' driving at 30 mph etc as no Porsche is driven hard all the time.
 
This still doesn’t explain why the mystical driver assistant displayed are not triggered as per the owners manual..
My understanding is the system is supposed to both manage itself and the driver if they happen to live in a city or drive like a granny…

Even if the garage or the owner has used incorrect oil it still doesn’t explain why the sequence of warnings indicators leading up to a 100% full appear not to be working.
 
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That’s my take on it too Paul. The apparent lack of any warning that the GPF is getting clogged appears to be the key. Even if the incorrect oil has been used [I agree with Dan on this] you would expect the monitoring system to flag-up an issue so that the owner can take the necessary corrective action.

It seems that the only way to try to avoid a GPF fault is either to drive the car very hard or perform the recommended regeneration procedure on a regular basis?🤔

Jeff
 
Yes which is recommended when the appropriate light comes on..🤦🏻‍♂️
I understand that there is an award on offer for any owner to share sight of the active regeneration request in the dash display..
 
My point was that even if there’s no warning light it would be sensible to perform the regeneration process regularly just as a precaution.

Jeff
 
Yes but without any visual indicator how do we know if following this process has been effective.
As far as I know there isn’t any data that supports what % the GPF fill is reduced by with a driver activated regeneration.
 
Just playing devil’s advocate Paul!😀

In the absence of any warning that the GPF is filling up - or indeed how effective is any driver-activated regeneration - it seems that in order to avoid the dreaded engine warning message the only way forward is to use either the regeneration procedure or an “Italian tune-up” on a regular basis.🙄

Jeff
 
To claim that the car is 'driven incorrectly' is a nonsense from Porsche, especially when they give no guidance in the handbook or any other documentation as to how it should be driven.
Similarly the idea that an owner may have caused the problem by topping up with incorrect oil is equally nonsensical, unless oil consumption is dramatically high.
This is all secondary to the fact that there is no definitive cause that has been identified - only informed opinion at best. And conveniently these opiinions place the responsibility back on the owner. OPC's have been unable to explain VAL report numbers, largely because they do not have the ability to test things like the AOS.
Finally, the blocked GPF's are the result of something ocurring elsewhere. They don't block themselves. If the cause were known, the likelihood is that it is something that is covered by warranty,

The idea that the GPF's are 'filters', service items (costing £7k+) that are not covered by the extended warranty, is being challenged, not least because they do not appear on any service schedule.

Dave continues his work on this and has saved owners many thousands of pounds. Thank you.
 
Agreed John. The whole thing smacks of Porsche seeking to avoid any financial jeopardy, not having fully developed the addition of the GPF or negotiated with the Extended Warranty insurer to include its replacement.

I wonder what is the attitude of other manufacturers to a GPF failure? Although I don’t recall seeing anything, I’m off to re-read the GRY Driver’s Manual to see if there’s any mention in there about warning messages and regeneration procedures!🤔

Jeff
 

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