This high fuel pressure is necessary, to overcome cylinder pressures, as direct injections systems need to inject fuel on the compression stroke, unlike low-pressure port fuel injection systems, which injects fuel into a partial vacuum. At the same time, such high fuel pressures can be inherently dangerous and destructive, which makes fuel pressure regulation critical. The engine control module controls fuel rail pressure by modulating the FRP regulator, using feedback from the FRP sensor. If the ECM detects a problem in the FRP regulator circuit, it will set a DTC P0092 Fuel Rail Pressure Regulator Control Circuit High, and illuminate the MIL.
What causes the problem of Fuel Pressure Regulator 1 Control Circuit High?
Faulty/damaged Fuel Pump Faulty wiring and connection in relation to sensor and regulators Fuel Pressure Regulator faulty Faulty ECM (Engine Control Module)
More Info About OBD Code P0092: https://partsavatar.ca/p0092-obd-ii-trouble-code-fuel-pressure-regulator-1-control-circuit-high-pump-sensor-injection-system
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