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Peugeot 4007 Boost Pressure Fault

My 2012 Peugeot 4007, Diesel engine, is showing a boost pressure control fault. The check engine light is on, power's reduced, engine response is poor, and fuel consumption is up. Mileage is at 88486 km. Any ideas?

A 2012 Peugeot 4007 with a diesel engine is experiencing a boost pressure control fault, leading to reduced power, poor engine response, and increased fuel consumption. The issue may be caused by a faulty vacuum switching valve or vacuum leaks around the turbo. Checking these components can help resolve the problem, and in this case, replacing the vacuum switching valve fixed the issue.

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4 comment(s)

I had something similar with my 4007. Same symptoms. Have you checked for any vacuum leaks? A faulty vacuum switching valve can cause compressor surge, leading to turbo lag and pressure drops. Might be worth a look before diving into more complicated things like the pressure sensor.

Vacuum leaks... where exactly should I be looking?

Honestly, it's tricky to pinpoint without proper equipment. But the hoses around the turbo and the vacuum switching valve itself are good starting points. If you're not comfortable poking around, a workshop will probably find it quickly. Could be a split hose or the valve failing internally.

Thanks for the tip! It was indeed the vacuum switching valve – cost me 140€ to get it sorted. Much appreciated!

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PEUGEOT

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4007