Hello. I changed the Dpf with cables and differential pressure sensor incl lines before approx. 5000 km. Now this error message always comes. ECM-2A00 pressure sensor Particle filter signal too low ECM 2A20 particle filter Error signal – is active before exhaust gas return control ECM 4477 flow too low and ECM 6720 flow too high. From time to time, it enters the emergency run with the message Stability control maintenance. After restart it works again. How can I find out? Did the additive itself replenished a year ago. The AGR has just been reworked. Have a Volvo V50 1.6 80 kw bj 2009 with 198000 km To answer I would be very grateful. Thank you.