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Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Controls And Fuel - 1.6L (LH7) Diesel - Diagnostic Information And Procedures (P205B - P2BAA) And Symptoms) >> Diagnostic Information And Procedures >> DTC P228A Or P228B: Fuel Pressure Regulator 1-2 Control - Forced Engine Shutdown >> Circuit/System Description

Circuit/System Description

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The engine control module (ECM) controls the fuel rail pressure by controlling fuel pressure regulator 1 and fuel pressure regulator 2 simultaneously to achieve the desired fuel rail pressure. The ECM compares the desired fuel pressure that is calculated and the actual fuel pressure reading from the fuel pressure sensor and monitors these two values to detect faults in the fuel system.