This Audi Came to is with the DPF Symbol on the dash board & the engine in limp mode, After checking live data & the dp…f back pressure manually we found the dpf to be blocked,
Further Diagnostics showed a faulty sensor was stopping the vehicle from regenerating causing the blocked dpf,
Once we had carried out our 3 stage clean & replaced the faulty component the A6 was back to full health & performing just as Audi intended