Captur diesel engine losing power

I'm having serious issues with my 2018 Renault Captur diesel. The check engine light keeps popping up, and the car feels like it's lost power. It's super sluggish, especially when accelerating, and I'm burning through fuel like crazy! It has 190006 km. I've heard something about a boost pressure control fault; does anyone have any ideas what could be causing this? I'm not very mechanically minded so any help would be great.

4 comment(s)

Sounds familiar. I had a similar problem with my old BMW 320d. Turned out to be a faulty vacuum switching valve. That can really mess with the turbo. Is the pressure sensor OK?

A vacuum switching valve, eh? Where is that located, and how would I even check if that's the problem? Is it easy to change? And how can I check the pressure sensor? Sorry for all the questions, but I'm lost here!

It controls the bypass valve. Honestly, unless you're comfortable working on cars, I'd take it to a workshop. Diagnosing turbo issues can be tricky and you'll need to use diagnostic tools to pinpoint it exactly. It could be that valve, but it could also be something else in the boost control system.

Thanks for the advice! I took it to a local shop, and you were spot on – it was indeed a faulty vacuum switching valve. They replaced it, and the car is running like new again. Cost me around 140€. I really appreciate your help!

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