Question about 2004 Ford Explorer
Sounds like your fuel pump is misbehaving. Check it for proper operation.
Posted on Jan 28, 2014
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Posted on Jan 02, 2017
SOURCE: p0193 fuel rail pressure circuit
P0193 - Fuel Rail Pressure Sensor Circuit High Input
The Fuel Rail Pressure (FRP) sensor is a diaphragm strain gauge device in which resistance changes with pressure. The electrical resistance of a strain gauge increases as pressure increases, and the resistance decreases as the pressure decreases. The varying resistance affects the voltage drop across the sensor terminals and provides electrical signal to the Powertrain Control Module (PCM) corresponding to pressure.
Strain gauge type sensors are consider passive sensors. A passive sensor is connected to a voltage divider network so that varying the resistance of the passive sensor causes a variation in total current flow.
Voltage that is dropped across a fixed resistor in series with the sensor resistor determines the voltage signal at the PCM. This voltage signal is equal to the reference voltage minus the voltage drop across the fixed resistor.
The FRP sensor measures the pressure of the fuel near the fuel injectors. This signal is used by the PCM to adjust the fuel injector pulse width and meter fuel to each combustion cylinder.
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine will not start
- Excessive resistance in the circuit
- Low or no fuel
- Wiring harness connector of the fuel pressure sensor
- Fuel Rail Pressure Sensor
- Fuel Pump
Hope this helps (remember to rate this answer).
Posted on Jan 12, 2011
SOURCE: Fuel rail system pressure too
What is too high? The specification for that vehicle is 35-70 Psi (2.4-4.8 kg/cm2)
What is the data reading on the Fuel Rail Pressure Transducer sensor?
What, exactly, are you trying to fix? Do you have rich oxygen sensor codes?
Posted on May 13, 2011
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