Panamera's PCV Failure? Telltale Signs & Solutions

I had almost identical issues with my 2015 Porsche Cayenne last year. The symptoms were spot on, rough idle, engine cutting out, and terrible fuel consumption. My check engine light was also flashing. Took it to my local Porsche specialist, and they diagnosed a failed crankcase ventilation system. The PCV valve was completely clogged, and there was oil residue in the intake manifold. They had to replace the entire PCV system and clean the intake. It wasn't a quick fix, had the car in the shop for 3 days, but it sorted out all the problems. Since then, the engine's been running smoothly, and my fuel economy is back to normal. This is definitely a serious issue that needs proper attention. If left unfixed, it can lead to oil leaks, increased engine wear, and potentially bigger engine problems. I'd recommend taking it to a certified Porsche dealer or a well-known Porsche specialist. They'll have the right diagnostic tools and experience with these specific issues.

Hey, thanks for sharing your experience! That's really helpful as it matches what I'm dealing with. I'm planning to take it to the Porsche dealer you mentioned. Just curious, do you remember roughly how much you ended up paying for the whole repair? And has everything been running smoothly since, or have you noticed any other quirks pop up? Cheers!

Hey there! Yeah, happy to help with the cost info, I ended up paying 360€ for the crankcase ventilation system repair at my Porsche specialist. And I'm glad to report that since getting it fixed, my Cayenne has been running like a dream! No more engine cutting out, no rough idle, and fuel consumption is back to what it should be. It's been about a year now since the repair, and I haven't had any other issues pop up. The investment was totally worth it, especially considering how much extra fuel I was wasting before the fix. Plus, it's good peace of mind knowing that leaving it unfixed could've led to more expensive problems down the road. If you're heading to the dealer, they might quote you a bit higher than what I paid at my specialist, but honestly, getting it sorted properly is the main thing. Let me know how it goes when you get it checked out!

Thanks so much for all that detail! I bit the bullet and took my Panamera to the dealer yesterday. You were right about everything, it was indeed the PCV system causing all the trouble. They quoted me a bit higher at 450€, but I figured it was worth getting it done properly. The whole thing took about two days, but wow, what a difference! Just picked it up this afternoon and it's like driving a completely different car. The engine's running super smooth now, no more jerking or cutting out. Even noticed the fuel gauge isn't dropping as fast as it was before. Really glad I asked here and got your advice instead of going back to my old mechanic. You saved me from another potential disaster! Thanks again for sharing your experience, it really helped me make the right decision. Case closed on this headache!