I had similar issue with my 2016 deleted ecodiesel: " Service Electronic Throttle" error and 50 mph max speed with a lot of black smoke. I made ECU reset with scanner and battery disconnect that helped for a few days only. I took it to mechanic and after 2 hours of diagnostic he came out with...
I got the same issue: "Service Electronic throttle", no codes. Truck lost power and barely can reach 40-50 m/h. I used Alfa OBD to monitor Accelerator pedal position D and E readings. Sensor E changes from 0 to 4574 mV, Sensor D changed polarity after about 80% of pedal position, from 6549 mV to...