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  1. J

    P2201 OBDII code 6.7 fix?

    MADDOG, when you speak of the 'upstream' sensor, are you saying that it is NOT the NOx sensor on the turbo elbow? My dealer scanned mine (2013 with 6.7) and came up with P2201, sensor 1/1, as well as P1C55 (NOx sensor performance). The dealer tech says it was the sensor by the turbo, as I...
  2. J

    P2201 OBDII code 6.7 fix?

    I went to the Dodge dealer and was told my check engine light scanned as P2201. The tech says it is the NOx sensor at the turbo. Since there are NOx sensors at the dpf and cat, how do I know the turbo NOx sensor is the correct sensor to replace?
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