Focus diesel crankcase issue

Sounds familiar! I had a similar issue with my old Renault Megane, although it wasn't quite the same symptoms. Did you check for any leaks around the crankcase? That was a dead giveaway for me. Is the smoke blue-ish, by any chance?

Thanks! I haven't spotted any obvious leaks, but I'll look again. The smoke is more greyish. What was the problem with your Megane? Was it the crankcase valve, and how did you sort it?

Yep, it was the crankcase valve in the end. The grey smoke could mean oil is getting burned, which points towards crankcase issues. I'd say get it checked by a pro, to be on the safe side. It's not worth risking further damage.

Appreciate the advice! I've booked it in with a local workshop. They confirmed it was a faulty crankcase ventilation valve. It's set to cost me around 360€ with parts and labor. Hopefully, that'll be the end of it!