Attention: TDR Forum Junkies 
2013 Ram 2500 58000 miles. code 2201.
Replaced upstream nox sensor with aftermarket part (Dorman). Code came back. Trying to monitor live data to see what is causing this. What is normal range for nox sensor1 readings? I'm getting a brief spike to over 2000 ppm when I close the throttle before falling to zero. Light load cruising is near zero. Accelerating ranges from 200 to 900 or so. Freeze frame always shows code set when nox was at over 2000 and near zero throttle(decelerating).
Replaced upstream nox sensor with aftermarket part (Dorman). Code came back. Trying to monitor live data to see what is causing this. What is normal range for nox sensor1 readings? I'm getting a brief spike to over 2000 ppm when I close the throttle before falling to zero. Light load cruising is near zero. Accelerating ranges from 200 to 900 or so. Freeze frame always shows code set when nox was at over 2000 and near zero throttle(decelerating).
