I found out from a good source that there is a defect on several ECUs 997/987 many vehicles are effected. Apparently Porsche of America can't figure it out and one of the Largest Porsche Dealers in the USA is working with a Porsche tuner to try to figure out the problem and help Porsche of America.
You will not get a CEL but a fault code P126 rich biast limit stuck which will not clear. There is no protocol/ procedures to repair it, PTECH (porsche technical support) has no solution yet.
Take your Car to the dealer and ask them to check for that code, if so you will either get a new ecu or reflash.