Hi to all My car is 2004 C8 2lt petrol Well here I am in the South of France on holiday and yesterday I got a warning message anti pollution fault and the warning light on the dash, This came on at start up first thing in the morning the car is still driving very well no signs of limp mode or anything. I have noticed that I have a slight exhaust rattle at idle just lift off idle and it goes away I was meaning to check that today anyway. What can I check myself sensors etc. I don't want to use a garage here if poss they are very expensive here in France I have had my car for many years and It does the journey four times a year, apart from the usual brake checks and oil services which I do every trip the car has been Brill. I hope someone can help Cheers and thank you John