engine fault code P226 D
There are a couple resources for codes, the one you listed doesn't appear to be a valid code the last letter isn't listed could it have been a different letter (C or F)? Both refer to the Turbo Charger.
Well the system won't let me post URL's yet so search OBDII diagnostics. Trouble codes for Porsche and the second one is Pelican Parts
I used the first to determine the issue with our 2013 Diesel which was confirmed by the dealer, and I use Pelican Parts for parts.