Hi i have a 206 1.4 petrol GLX, it is on a 51 plate and has recently started juddering and the engine managment light is flashing, when cold it starts fine and runs until it starts to warm up a little, then the power seems to drop a little and starts to judder and the engine light starts to flash. Any ideas or has anybody else had similar problems? I have had it serviced and came out of the garage thinking all was fine, then it happend again.!!!!!! please help.