Set Condition:
WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The PCM runs a monitor for this DTC at the end of the DEF Pump prime sequence. When the DEF Supply Pump can build and maintain 130 psi (9 bar), the DEF Dosing Control Unit will command the DEF Injector to open and looks for a pressure drop in the system. If the pressure drop does not occur, the DEF Dosing Control Unit assumes there is a blockage in the DEF Pressure Line or DEF Injector nozzle. If the DEF Dosing Control Unit detects a blockage after ten attempts, a DTC is set and diesel exhaust fluid injection into the aftertreatment system is disabled.