Sensor, Fuel Pressure: Operation
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- The fuel pressure sensor receives voltage and ground from the Powertrain Control Module (PCM), then provides a return input to the PCM through a separate signal circuit. This input along with internal programming and numerous inputs from other sensors allows the PCM to modulate fuel injection pressure and regulate fuel injector pulse duration as appropriate.
- The fuel pressure sensor control and signal circuits are continuously monitored by the PCM. If the PCM detects a problem in any monitored circuit, it will store a Diagnostic Trouble Code (DTC) in its memory circuits. Such a DTC can be retrieved from the PCM through the Controller Area Network (CAN) data bus using a diagnostic scan tool connected to the Data Link Connector (DLC).
- The fuel pressure sensor and the hardwired circuits between the sensor and the PCM may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. However, conventional diagnostic methods will not prove conclusive in the diagnosis of the fuel pressure sensor or the electronic controls or communication between other modules and devices that provide some features of the fuel injection system. The most reliable, efficient, and accurate means to diagnose the fuel pressure sensor or the electronic controls and communication related to fuel injection system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.