aftertreatment1outletnox1j1939 - SPN 3226

The raw estimate for the amount of combined NO and NO2 in the exhaust exiting the aftertreatment system measured by a NOx sensor at the aftertreatment outlet in exhaust bank 1.

The concentration of NO and NO2 in the exhaust in ppm (parts per million) in the exhaust. Note that the maximum value of this signal is 3,012.75, and when aftertreatment1outletnox1j1939 is equal to 3012.8, the ambient or engine operating conditions do not permit the sensor to operate in data collection mode.

Note that this signal contains the raw, uncorrected NOx sensor signal, and 2016 model year vehicles may be equipped with a corrected NOx sensor signal, which is SPN 7351.

Also note that negative values of this signal should be treated as a concentration of 0 ppm.

idxs = gdf.loc[gdf['aftertreatment1outletnox1j1939'] > 3012.75].index
gdf.loc[idxs, 'aftertreatment1outletnox1j1939'] = np.nan

idxs = gdf.loc[gdf['aftertreatment1outletnox1j1939'] < 0].index
gdf.loc[idxs, 'aftertreatment1outletnox1j1939'] = 0

Time series plot of aftertreatment1outletnox1j1939