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jenniferfrank1

Citroen C8 higher fuel consumption and stalling

Friends, I'm at my wit's end. My 2007 Citroen C8, diesel engine, is giving me fits. Only 33730 km on the clock! Symptoms? Higher fuel consumption than normal, the engine stalls sometimes at idle, the check engine light is mocking me, and there's smoke when I accelerate. Could this be the mass air flow meter (LMM)? I suspect a defective sensor. Does anyone have any advice?

Summary of the thread

A 2007 Citroen C8 with a diesel engine is experiencing higher fuel consumption, engine stalling at idle, a check engine light, and smoke during acceleration. The suspected cause is a defective mass air flow sensor (LMM), which can lead to these symptoms. The solution involves confirming the issue with a mechanic and replacing the faulty sensor, which resolved the problem.

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4 comment(s)

antonwinkler26

Sounds familiar. I have a C8 as well. Is your air intake system clear? I had similar symptoms a while back. Check engine light, stalling, and a noticeable decline in performance. How old is your air filter, by the way?

jenniferfrank1 (community.author)

Thanks for the quick reply! I replaced the air filter recently, but how would I check the air intake system thoroughly, and could a dirty mass air flow meter (LMM) really cause all these issues?

antonwinkler26

Well, I'm no mechanic, but those symptoms scream mass air flow sensor problems to me. I ended up taking mine to a workshop. They confirmed it was a defective mass air flow sensor. Saved me a lot of headaches, to be honest.

jenniferfrank1 (community.author)

Appreciate the insight! That confirms my suspicion. I'll book it in with a trusted mechanic. Turns out the mass air flow sensor was indeed defective, and the repair cost me 365€. Thanks again!

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CITROEN

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C8