Hi Ian
Without Prejudice
The hand book is well written explaining what happens when a high soot value needs driver intervention.
It's a shame the car doesn’t put on the light, or a message. In all the cars I have dealt with, in the last year no light or message has been seen.
We have unfortunately at the moment a major emission function error on the cars we are dealing with.
We are expecting the soot warning light to work, Porsche technical are insisting it should work, but sadly it doesn't.
But when we look at the soot calculated and measured values, there never seems to be much in, most of the time you only see a reading in the measured section and thats usually 0.00 %.
The only sensor that can trigger a regeneration is the differential pressure sensor and that always shows a very low differential pressure readings.The regeneration will only happen with high soot levels and high readings.
Yet we are being told the exhaust is blocked. A blocked exhaust would show alot higher differential pressure readings.
The only light that warns the driver of an issue is the engine warning light.
This comes on with a permitted to drive message, and a visit to the dealer, if the fault code is P242F , then a potential bill of £7,500.00 is discussed.
We then have to fight with the dealers and Porsche technical to get them to cover this cost, on the grounds this is a manufacturing defect, which can take us months.
This trouble code is nothing to do with soot, its the oil ash/loading thats reached 100%, and when it comes on its to late to save the GPF.
Which is absolutely ridiculous bearing in mind the low mileages covered on these cars.
We have asked all the Porsche service departments who have dealt with our cars to show us this light working, still waiting, its been a year now.
Sorry for going on but all this information is crucial to our argument that something is sadly wrong with our cars.
We just need an acknowledgement from Porsche Cars that they are looking into this problem on their cars, and we don't need to worry.
Dave