maxmiller59

Peugeot 307 power loss and fuel consumption

Hi, I'm having trouble with my 2007 Peugeot 307 (Diesel engine). The check engine light is on, and the car feels like it's lost power. It's not responding well when I accelerate, and I'm burning through fuel like crazy. Could this be a vacuum leak? It has 186312 km, I'm really worried!

4 comment(s)

Hey, I had a similar issue with my Peugeot 307, though it was a few years older. Same symptoms: check engine light, sluggish performance, and terrible fuel economy. It turned out to be a faulty boost pressure control valve, or vacuum switching valve. Have you checked that?

Thanks for the quick reply! Where exactly is that valve located, and is it something I could potentially check myself, or is it too complicated?

It's usually near the turbo, but honestly, without the right tools and knowledge, it's tricky to diagnose for sure. Given the symptoms and mileage, a defective vacuum switching valve is very likely. I ended up taking mine to a workshop; they confirmed it quickly. Cost me about 140€ including parts and labor.

Thanks a lot for the advice! I'll take it to a workshop and mention the boost pressure control valve. Hopefully, that's the issue. I really appreciate the help!

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