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charlesblitz10

Citroen C5 Engine Issues

I have a 2011 Citroen C5 diesel with about 27414 km on the clock. Recently, I've noticed reduced engine power, the check engine light is on, rough engine running, higher fuel consumption, and jerking when accelerating. Could this be due to the engine running too rich? I suspect a defective injection valve/injector. Any thoughts?

4 comment(s)

horst_koenig1

Sounds familiar! I had similar symptoms with my old Opel Astra after the spark plugs went bad. Reduced power and a rough idle are definitely signs of a rich mixture. Have you checked the intake manifold or the oxygen sensor? A faulty catalytic converter could also cause this.

charlesblitz10 (Author)

Thanks for the insight! I'll look into those. When you say spark plugs, were they visibly fouled, or was it more subtle? I haven't checked them specifically on my C5 yet.

horst_koenig1

They were pretty black and sooty, which pointed to the rich mixture. But yeah, the symptoms sound really similar to what I experienced before taking it to the workshop. Maybe get it checked out by a pro?

charlesblitz10 (Author)

Thanks a lot! After visiting the workshop, you were right. An injector was indeed defective. Replaced it, and the car runs perfectly now. Total cost: 515€.

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