Megane hybrid boost pressure control fault

Hey, I have a Megane too (not sure of the year, it's a bit older), and that sounds super familiar! Did you notice any weird noises, like a slight whistle maybe? I had similar symptoms - loss of power, engine light, the whole shebang. For me the problem was the intake manifold, but I am not sure if the hybrid engine is identical to mine.

No whistle that I've noticed. Where exactly was the intake manifold issue?

Right, it was a vacuum switching valve defect. I remember now. I tried to fix it myself, but in the end, I had to take it to a workshop. Probably best to get it checked by a pro.

Thanks for the tip! Took it to the shop, and it was indeed a defect in the vacuum switching valve. Repair cost was 140€. Runs like new again.