I have a 2018 Ecodiesel (150,000 miles) that is throwing a p2002 code. I have the AlfaOBD so I know my DPF and sensors are working. Fuel mileage has actually increased. I forced a regen but light and code are still on. I have not check for an exhaust leak. From what I have read it could be the Exhaust back pressure sensor. This is on the rear of the motor. My question is has anyone replaced this due to this code? Do I need to clean the tube as well. If so what were the steps you took to do this. I do want and plan on deleting it soon. Has anyone had luck with bigdaddydiesel.com? Thanks