Hi I have a 2009 peugeot 308sw 1.6 hdi which is not accelarating smoothly. The display is showing a faulty depollution filter. This has been appearing intermitently for a good while now. I was told to regenerate the depollution filter, by driving 20 miles with engine revving above 3500 rpm, which i did yesterday. However this morning the car is still displaying faulty depollution filter and acting up. I have recently had the air and fuel filters replaced. Could anyone point me in the direction of someone with diagnostic equipment to get to the bottom of this please. I live in Handsworth,Sheffield,South Yorkshire.