Rail, Fuel: Description: Description
WARNING: This page is about a different car, the 2015 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
The high pressure pump supplies diesel fuel to the fuel rail which deliveries high pressure fuel to all injectors. A fuel rail pressure sensor, fuel rail pressure solenoid, and the return flow line are all combine to keep the fuel pressure in the fuel rail at the required pressure.