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Citroen C2 Diesel Engine Power Loss

I'm experiencing a problem with my 2008 Citroen C2 diesel. The check engine light is on and off, engine power is reduced, and the response is poor. I hear a whistling noise, and a loud hissing sound during acceleration. Sometimes the engine stalls, and fuel consumption is higher. My car has 124801 km on the clock. Could this be related to the boost pressure actuator?

A 2008 Citroen C2 diesel is experiencing engine power loss, poor response, and increased fuel consumption, accompanied by a whistling and hissing noise during acceleration. These symptoms suggest a potential boost leak, possibly due to a split hose, faulty boost pressure actuator, or defective electrical bypass valve. After inspecting vacuum lines and confirming their integrity, a workshop diagnosis identified a defective electrical bypass valve, which was replaced, resolving the issue.

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4 comment(s)

Sounds like a potential boost leak. The whistling and hissing are classic symptoms. Does it feel like the turbo isn't kicking in properly? Could be a split hose or a faulty actuator. Have you checked all the vacuum lines for cracks or disconnections? Give them a wiggle and see if anything changes. A defective electrical bypass valve might cause this as well.

Thanks for the quick response. I will inspect the vacuum lines. If they appear to be intact, is there a way to confirm whether the boost pressure actuator is the problem?

Without proper diagnostic tools, it's tough to say. You could try watching the actuator arm while someone revs the engine to see if it's moving freely. But honestly, with those symptoms, and if the vacuum lines are good, you're probably looking at a faulty actuator or even the turbo itself. It's best to get it to a workshop for a proper diagnosis to avoid unnecessary repairs. It could cost you around 250€.

I appreciate your input. I followed your advice and took the car to a workshop. The diagnostic confirmed a defective electrical bypass valve, just as you suspected. The valve has been replaced, and the car is now running smoothly. Thank you for your assistance.

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