Multiple Issues with GrandlandX, Intake Problems?

Hey there! I've got some experience with cars (some experience level), and I actually had a similar issue with my 2015 Vauxhall Insignia diesel last year. Sounds exactly like what you're describing. Had the same symptoms, engine light, power loss, the whole shaking thing. Took it to my regular workshop, and yep, it was a broken swirl flap. Cost me around 865€ to fix, but it sorted everything out. They had to replace the entire intake manifold because of how these things are built. Before I share more details about my experience, what's your mileage and have you noticed any black smoke from the exhaust? Also, when exactly did these symptoms start? This could help me give you more specific advice about what to look out for. Quick heads up, if it is the swirl flap, don't wait too long to get it checked. These things can cause more damage if left unattended.

Thanks for sharing your experience! My mileage is at 161501 KM, and I just had my last service about a month ago. Actually, I haven't noticed any black smoke, but the symptoms started pretty suddenly last week when I was on the highway. It just went from running perfectly fine to all these issues in one go. Your Insignia story sounds spot on to what I'm experiencing. That's really helpful to know about the intake manifold needing complete replacement, definitely something I'll keep in mind. I'll try to get it to my mechanic asap. Did your car also make that hissing sound I mentioned? Just wondering if that's another confirmation it might be the same issue.

Hey again! Thanks for those details. Yes, my Insignia definitely had that hissing sound you're talking about, it was particularly noticeable during acceleration, right? It's like a loud swooshing noise. That's actually one of the classic signs of a swirl flap issue, which makes me even more convinced we had the same problem. Interesting that yours started suddenly on the highway, mine did something similar around 155,000 KM. I was actually on my way to visit family when it just went into limp mode. Not fun at all! The fact that yours started so suddenly without black smoke is pretty much identical to what I experienced. Since you mentioned getting it serviced recently, might be worth checking with that garage if they noticed anything off during the service. Sometimes these issues can start small and then just... boom! In my case, the mechanics said there were some early warning signs they could've caught if they'd known what to look for. Just to add, when I got mine fixed, the garage showed me the old part. The flap was completely stuck, which explained all those symptoms. If you want, I can share some pics of what it looked like. Might help when you talk to your mechanic!

Really appreciate all this detailed info! The hissing sound is exactly as you described, that swooshing noise during acceleration. It's actually a relief to hear your experience matches mine so closely, even down to the sudden onset around the same mileage. I'll definitely call my service garage tomorrow and mention what you've said. It would be super helpful if you could share those pics, I can show them to my mechanic when I take it in. The more info I have, the better! Thanks again for taking the time to help out. It's been really reassuring to hear from someone who's been through the same thing. I'll get it sorted before it causes any more issues. You've probably saved me a lot of headache and potentially more expensive repairs down the line!