If the vehicle cannot return to run position after start or if the interior fan is not getting power, it may be the electrical portion of the ignition switch has become erratic or has failed. The entire switch assembly should be replaced.
Resources for the Repair and Maintenance of your 2010 Porsche Cayman S
2010 Porsche Cayman S
2010 Porsche Cayman S Problems
Smoke, oil consumption, and fuel trim issues with various fault codes can be traced to an internal leak at the oil separator.
Due to air leaks at various locations after the mass air flow sensor, the Check Engine Light may illuminate with fault codes P0171 and P0174 stored.
A failing mass air flow sensor or EVAP system purge valve can cause engine misfire concerns. Proper diagnoses of engine misfire issues is necessary to correct these issues.
A fault with the camshaft tensioner may cause camshaft timing issues resulting in illumination of the Check Engine Light.