DS3 Reduced Engine Power

Hey, I had similar symptoms with my DS3. Did you notice any rough idling or stalling? If so, it really sounds like the manifold pressure sensor. Could be worth checking the sensor wiring and vacuum lines for damage or leaks.

Thanks for the reply! I haven't noticed any rough idling or stalling, but the other symptoms are spot on. How did you figure out it was the manifold pressure sensor? And was it a pain to replace?

No worries. I didn't figure it out myself, I took it to a workshop. They plugged it in, read the error code, and diagnosed it pretty quickly. They said there was a large vacuum leakage detected. Honestly, unless you're really comfortable working on cars, I'd recommend getting it checked out by a professional.

Appreciate the advice! I'll take it to a workshop and get it checked out. Turns out it was the manifold pressure sensor after all, with a large vacuum leakage. Repair cost me 235€ Thanks again for pointing me in the right direction!