S60 Diesel Crankcase Issue

I had a similar issue with my 2014 Opel Insignia diesel. The symptoms you describe – check engine light, power loss, and smoke – sound very familiar. In my case, it was a clogged crankcase ventilation valve, causing a buildup of pressure in the crankcase, leading to oil leaks and poor engine performance. Did you notice any unusual smells or sounds, like a whistling noise at idle? The whistling can indicate a vacuum leak in the ventilation system.

Thanks for your insights. I appreciate you sharing your experience with the Opel Insignia. I haven't detected any distinct whistling noises at idle, but I have noticed a slight increase in engine vibration, mostly at lower RPMs. Could the absence of whistling sounds mean a different crankcase ventilation malfunction or a blockage elsewhere in the system? What other problems did you have besides the typical symptoms?

Okay, the absence of whistling could mean something slightly different, but it still points towards crankcase ventilation issues. In my case, besides the check engine light, power loss, and smoke, I also noticed increased oil consumption. Even without the whistling noise, the increased vibration you are experiencing could be related to the crankcase pressure. Honestly, given the symptoms and your initial suspicion, the best thing to do might be to take it to a trusted mechanic. They can perform a smoke test to pinpoint any leaks in the system and accurately diagnose the problem. That's what I did eventually.

I appreciate your comprehensive advice. Based on your experiences and recommendations, I'll get a qualified mechanic for a diagnostic assessment. The repair cost is about 360€, including replacing the crankcase ventilation valve and a system check. Thanks again for sharing your experience.