Corsa intake manifold flap issue

That sounds awfully familiar! I've got a Corsa too (petrol though), and had some very similar symptoms a while back. Is your engine light on? Mine was practically glowing! I was convinced it was the airflow meter but changing that didn't fix anything.

Yeah, the engine light's on. What was the issue for you in the end? Was it difficult to fix?

Turned out to be exactly what you said - intake manifold flap control! Honestly, unless you're a really good mechanic, I'd take it to a workshop. It's a bit fiddly to get to, and you might need some specialist tools. It cost me a bit, but at least it's running well now.

Appreciate the insight. I took it to a local garage; they confirmed it's the intake manifold flap control, like you and the error code suggested. They quoted me 465€ to fix it, which stings a bit, but at least I know what's wrong. Thanks again!