V40 Manifold Pressure Sensor Issue

I also own a V40. Your description sounds like a problem I had not too long ago. Reduced power and a check engine light were my main symptoms. How did you determine the vacuum leak? Specific tests, or just diagnostic codes?

I did a smoke test on the intake manifold, which showed a leak near the sensor. The diagnostic code supported this. Did your symptoms match mine, and did you replace the sensor?

My symptoms were nearly identical. Given your smoke test and the code, it's probably the same issue. I'd suggest taking it to a workshop for sensor replacement, or doing it yourself if you know how. I didn't. That should resolve it.

Thanks for the advice. I took it to a mechanic. The manifold pressure sensor was the problem. Replacement, including labor, cost 235€. The engine's running normally now.