Cayman 718 GPF Failure

[Motorhead]

Hi Dave,

That 991.2 report reads like a work of fiction! Apart from the Bank1 vs Bank2 measured oil ash load, the figures for both banks are identical [why is Bank1 twice that of Bank2?], and how is it that the calculated exhaust gas temperature of 346 degC in the filter is more than 5 times that of the calculated temperature upstream of the filter, the latter value being [an unbelievable] 61 degC? Being calculated values , obviously there’s something amiss with the software being used to compute these [fictional] values.

Do the dealers actually look at these figures? They’re having a laugh aren’t they?

Keep up the good work. It’ll pay-off … eventually!

Jeff

 

[Cyclemotor1958]

Hi Jeff,

Without Prejudice

Thanks for coming back to us on this subject.

The reason why the upstream exhaust temperatures are lower is the engine wasn't running at the time of the diagnostic test.

When the engine is running the algorithm kicks in, taking information from other engine sensors.

This is the same on our 718 cars.

We will at some point be checking out cars post 2019 to see if the oil ash % software readings show similar range settings to our cars.

Bearing in mind these cars have exhaust temperature sensors fitted, not like our
2.0, 2.5 718 vehicles.

From information we have received both the GPF filters and the exhaust temperature sensors have been superseded since production.

Sounds familiar.

Regards
David