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nox sensor1 code

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  1. Rambo 7007

    Code 2201

    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...
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