Koleos check engine light

My 2021 Renault Koleos diesel, with 95388 km, is showing a check engine light. Engine power is reduced, and there's smoke when accelerating. I suspect the crankcase ventilation valve. Has anyone had similar experiences?

4 comment(s)

I had a similar issue with my Koleos. Check the crankcase ventilation valve and its hoses for leaks or damage. A malfunctioning valve can cause those symptoms. What does the engine idle sound like?

Idle seems rough, fluctuating slightly. Did replacing the valve resolve your issue? What was the repair cost?

Yes, replacing the valve solved the problem. Given your rough idle and other symptoms, it does sound like the crankcase ventilation. I would suggest taking it to a workshop to confirm. I got it fixed for 360€.

Thanks for the confirmation. I'll take it to a workshop for inspection and replacement. Hopefully, it resolves the issue.

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