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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1144 (Engine Controls Diagnosis - 6.0L - Alternative Fuels (DTC P0005-DTC P2665)) >> Diagnosis >> DTC P1431: Fuel Pressure Sensor Performance >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The fuel tank pressure (FTP) sensor is a pressure transducer. The fuel injector control module (FICM) supplies 5 volts to the FTP reference voltage circuit. The FICM also supplies a low reference and signal circuit to the FTP sensor. The FICM monitors the FTP sensor voltage and communicates the data to the powertrain control module (PCM) by a dedicated pulse width modulated (PWM) circuit. This DTC sets when the FTP pressure has not dropped during vehicle operation.

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