My father has just purchased a 2009 forester diesel, after having a 2lt petrol for many years. However, this week the “carbon particulates” filter light came on, followed by the engine management light and the vehicle dynamic light. He has taken it back to Subaru twice now in a week (2 different dealers) neither of which had any ideas, plugged in a laptop and reset everything. However 1 day later they have all come on again. Do you know if this a common problem if so is there a solution that anybody is aware of? We have lost confidence in the main dealers so I started searching the web for ideas. Any help would be appreciated.