I have Zafira A (2002) 2.0 dti and recently when engine reaches about 3500 rpm (regardless gear or speed) it enters safe mode and won't go above 2500 rpm, also loses power. Ofcourse, after I stop the car and remove the key and then start it again, the problem is gone and it doesn't occur again until the engine reaches mentioned 3500 rpm. I cleaned the EGR valve and the problem seem to disappear, now since I am far from car expert I was wondering if this was the only issue or there could be more problems or faulty parts?
Also I noticed these parts which I couldn't identify and I was wondering if someone can tell me what they are. Here are the pictures:
Thank you!