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ben_fuchs5

C6 Cylinder Pressure Fluctuation

Hi, I'm having a strange issue with my 2012 Citroen C6 diesel. It's got 245134 km on the clock. I've noticed higher fuel consumption lately, and the engine seems to have lost some power. Also, the check engine light is now on. I had the codes read, and it's showing a cylinder pressure fluctuation. I've checked the spark plugs, but they look okay. Any ideas?

4 comment(s)

erwinknight5

Hey! That sounds familiar. I had something similar happen with my old Saab 9-3. Same symptoms, check engine light and everything. Have you checked the timing belt? In my case, it jumped a tooth and messed everything up. Could also be related to the camshaft position. Any weird engine knocking?

ben_fuchs5 (Author)

Thanks for the quick response! I haven't checked the timing belt yet, that's a good shout. I haven't noticed any engine knocking, but I'll listen more closely. What was the final diagnosis with your Saab?

erwinknight5

Well, after tearing my hair out, a mechanic finally figured out the timing belt issue. It caused a consequential error, making it seem like something else was wrong. Honestly, with the cylinder pressure thing, I'd take it to a decent workshop. They'll be able to check the timing properly. Saved me a ton of headaches!

ben_fuchs5 (Author)

Thanks for the advice! I took your advice and brought it to the workshop. Turns out the cylinder pressure fluctuation was a consequential error due to another issue - which they fixed under warranty. Final repair cost 0€. Cheers!

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