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hans_fuchs1
Citroen C4 EGR Valve Defect
4 comment(s)
hans_fuchs1 (Author)
Yes, fuel consumption definitely increased a bit before the other symptoms became obvious. Did you also experience the hissing sound when accelerating?
dominikmaier1
Okay, yeah, sounds exactly like what I had. I didn't have the hissing, but probably related. I suggest you get it checked at a workshop. It sounds like the EGR valve is jammed. I tried cleaning it, but it didn't solve the issue for long.
hans_fuchs1 (Author)
Thanks for the confirmation! I'll take it to the workshop then. Turns out the EGR valve was indeed defective and needed replacement. Repair cost: 355€. Hopefully, that's the end of it.
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dominikmaier1
Sounds familiar. I had similar symptoms on my C4. Reduced power and a check engine light were the first signs. Did you notice any difference in fuel consumption before the other symptoms appeared?