Set Condition
WARNING: This page is about a different car, the 2014 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
The PCM detects that a comparison between the DEF Pump pressure and Ambient pressure is above or below a calibrated threshold for a calibrated amount of time. This DTC will also set if the comparison shows no change at all for a calibrated amount of time. This is a two Trip Fault.