[silver-S]

I got these codes when my air-oil separator went bad. Simple test: if you can't get the oil filler cap off when the engine's running, that's your problem. The bad AOS puts a fierce vacuum in the filler tube. You may see a big burst of white smoke on starting, but I've also seen a Boxster trailing a faint stream of burning oil smoke that the owner was probably unaware of. Worth checking, in any case, since it's an easy test for a common problem.