How are you doing?, I was seeing that you helped a megane a couple of years ago with the C0 high that does not pass the itv. What do you want to see how I can do to fix it?. I have a megane 2 1.6 16v engine k4m which is killing me with the topic combustion. I have the values of C0 and HC very high, what can it be? What area lambda? I have filters, and bujias new. What if I think that the regulator in the alternator, to me is failing. To others if you're parked with the engine turned on, you are feeling smell of naphtha raw. How I can help?.