Peugeot 5008 Engine Power Loss

I've encountered something comparable with my 5008, although I can't say the mileage lines up exactly. The symptoms you describe—the engine light, power loss, and increased fuel usage—point towards a potential vacuum leak affecting the manifold pressure readings. Before condemning the sensor, have you checked for any obvious signs of vacuum hose damage or disconnections?

Thanks for the quick reply! I haven't thoroughly checked for vacuum leaks yet, but I'll definitely prioritize that. Is there a specific area in the engine bay where these leaks are more common on the 5008, or are there any specific hoses that are known to fail?

While there isn't a single, universally weak point, I would advise a careful inspection of all vacuum lines, particularly those connected to the intake manifold and the brake booster. Given the age and mileage of your vehicle, it might be prudent to have a workshop perform a smoke test to pinpoint any leaks that are not immediately visible. It seems like a large leak. A faulty MAP sensor should throw a code but may not trigger this kind of severe behaviour.

Alright, thanks for the advice. I finally brought it in to a workshop. You were spot on about the vacuum leak. They found a cracked hose, replaced the manifold pressure sensor and the hose. Total cost was 235€. Runs like new now!