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Home >> Chrysler >> 2011 >> 300 Base, Gas >> Repair and Diagnosis >> External Pages >> Different car >> Section 1926 (6.7L Diesel - DTCS P0008-00 To P02E3-00 - 2500HD & 3500HD) >> DTC Troubleshooting >> P0091-00-Fuel Pressure Regulator 1 Control Circuit Low >> Theory Of Operation

Theory Of Operation

WARNING: This page is about a different car, the 2019 RAM 3500 HD and 2019 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

The Fuel Pressure Regulator is attached to the rear of the Fuel Rail. The Powertrain Control Module (PCM) sends a signal to the regulator to open the fuel return line and adjust the pressure in the fuel rail.

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