Theory Of Operation
WARNING: This page is about a different car, the 2016 RAM 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The purpose of the diagnostic is to check if the reverse gear is engaged while neutral is selected based on the shift lever position. This diagnostic includes a speed ratio check. The shift lever controls the selection of the park, reverse, neutral and drive gears hydraulically. In neutral, the Transmission is hydraulically controlled to have no gear engaged. A comparison between the Turbine speed ratio and the Engine speed is performed. If the ratio is out of limits, this DTC will set.