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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 215 (Engine Control System (DTC/Circuit Diagnosis) (CUMMINS 5.0L) (2 Of 6)) >> DTC/Circuit Diagnosis >> DTC P0191-00: Fuel Rail Pressure Sensor >> DTC Description >> Notes

DTC Description: Notes

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.

The engine control module (ECM) monitors engine operating conditions, including the reading of fuel rail pressure, and changes the flow command to either increase (OPEN the fuel metering valve) or decrease (CLOSE the fuel metering valve) the fuel supply to the high-pressure pump.

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