Regen is not the problem, the car has always done this without any fuss, the problem is the ERG, we are on the second replacement valve in 2 months and it still has the same fault. Fiat are not interested any more even though they supplyed the parts, saying the fault must be else where, well thanks for the help Fiat and the £95 you charged us for the diagnostic only to tell us the car is saying ERG fault. I'm all for cleaner cars but not at this cost, if I can get all the emisions crap off I will do it.