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Home >> Chevrolet >> 2009 >> Traverse LS, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 73 (Engine Control System & Fuel System - 3.6L - DTC P0008 To DTC P0191) >> DTC P0191 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2010 Saturn Outlook, 2010 GMC Acadia, 2010 Chevrolet Traverse, and 2010 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

The fuel rail fuel pressure sensor detects fuel pressure within the fuel rail. The engine control module (ECM) provides a 5 V reference voltage on the 5 V reference circuit and ground on the low reference circuit. The ECM receives a varying signal voltage on the signal circuit. The ECM monitors the voltage on the fuel rail fuel pressure sensor circuits. When the fuel pressure is high, the signal voltage is high. When the fuel pressure is low, the signal voltage is low.

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