My car is a 2006 model 1.4hdi x-design I bought it at 220 thousand 251xxx. I have been using it for about 1.5 years now and I have regular maintenance. I got a new visa 1 month ago. My problem is this. About 5 months ago my car turned on a yellow light while going uphill. It was an engine failure and the car lost traction and didn't use gas. I showed it to someone from the industry and they said there was no problem. They said it was doing these things and said it would go away on its own and it did. The inspection showed no problem neither in the exhaust nor in the engine. After the inspection, this yellow light issue started to reoccur. It happened 2 3 times and for the last 2 weeks the car started to throw black smoke. I checked the oil and couldn't see any problem. Now I went on a long road trip because of the holiday. The car turned on a yellow light again and this time it didn't go off. For a long time, especially on the hills, it lost traction. The gas pedal was unresponsive as if it was inactive and the weirdest thing is that when the yellow light came on, the black smoke stopped. I used the car at high speed for part of the long road. I think it is fuel-related. I won't buy fuel other than Shell-Opet. Finally, after the holiday, I returned today and got in this morning and the car did not emit black smoke and the yellow light went out. I would appreciate it if anyone who has experienced or knows what the source of the problem could be could help me. I wrote it in as much detail as possible so that it would be easy to understand.
fegger