Thanx for the information @Shyam Sundar Nijgal. From what I have read here so far (including the latest from @limraj), we have faced related problems, but in different forms and in different conditions. My car never came to standstill. I don't use the car that frequently on highways and generally my use is low (~10k km a year). Also, as I wrote, this problems is not faced during my city drives, but was noticed only during outstation trips. Therefore, I am not facing it day-to-day and can't say if it has been solved. Lets wait and monitor. I am not for any remap or EGR disconnection, at least not now!