Smoke, oil consumption, and fuel trim issues with various fault codes can be traced to an internal leak at the oil separator.Google+
Car Problem Reports
Porsche 911 Various Faults Due to Intenal Leak at the Oil Seperator
Porsche 911 Problem
Engine Affected: 3.4L 6 Cylinder
Average Mileage: 88,000 mi (75,000 mi - 105,000 mi)
Visitor, 2004 Porsche 911, 75,000 mi
Visitor, 2003 Porsche 911, 92,000 mi
white smoke in the rear right at start up. The white smoke is only for 2-4 minutes at engine start.
Visitor, 2003 Porsche 911, 80,000 mi
dealer replaced separator; cost more than $2k
Visitor, 2002 Porsche 911, 105,000 mi
Occasional inconsistent throttle response and idle. Weeping seen on and around the separator. Replaced the part, about 7 hours in shop labor.