FIROZ OSMAN

Can somebody help I have jaguar xj6 sovereign 2008 covered 47,000 miles and has developed an engine problem When started it makes clunking and grinding noise I was told that the its due to the particulate filter The vehicle if driven in town which mine is needs to be driven for twenty odd minutes at high speed How do I avoid since I am replacing a lot of engine problems Thanking all in anticipation and looking forward to good advice