Re: P0446 and P0447 codes ...

Recently replaced O-rings on the heat exchanger/cooler inside the engine bay to fix a coolant and small oil leak. Had to disconnect the emission line directly above the exchanger to pull it out enough to replace the O-rings. No more leaks from the exchanger; oil or coolant. Now I get the 2 codes popped at the same time while the car is cold. I can hear the solenoid activating. I've read where you can test a vacuum leak by spraying carburetor cleaner on the lines to hear the idle change.

Any suggestions? I've also read to blow-out the lines from the right front wheel well.

v/r

Dave

2004 Boxster S SE
118K miles

... are related to Evaporative Emissions, and have nothing to do with the coolant vent line.
I don't think they are related, just a coincidence that it happened after you changed the O-rings on the heat transfer unit.
The purge valve inside the right front wheel well is the likely culprit for your codes.
Happy Boxstering
Pedro

Pedro Bonilla
1998 Boxster 986 - 311,000+ miles: [www.PedrosGarage.com]
PCA National Club Racing Scrutineer - PCA National HPDE Instructor - PCA Technical Committee (Boxster/Cayman)

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Leak started at the next weak spot unfortunately. I'll pull back in the garage to trace again. Its a slow leak. Car runs great though!