Question about 2004 Ford Freestar

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Fuel rail pressure sensor chkt high input p0193

On my 2004 FORD FREESTAR-
THIS IS THE CODE THAT WAS PULLED WHEN MY CHECK ENGINE LIGHT CAME ON- CAN'T GET INTO THE DEALER FOR A FEW DAYS...ANY IDEA WHAT THIS USUALLY COSTS OR WHAT NEEDS TO BE REPLACED?

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  • Anonymous Mar 30, 2014

    Code p0193 fuel rail sensor , have replaced filter and gas cap ,car runs like a top but code keeps comming back

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  • 17 Answers

Mine is on too (MIL, with p0193), 2005 freestar. My dealer can't figure it out for some reason? So I went out and bought a code reader, will fix it myself!
Anyways it can be the fuel pressure sensor (approx $100 for part), the fuel pump, or regulator on the fuel line, not too sure what they are worth, and time for labour? I am currently looking for a test gauge to check the pressure in the fuel line to see if it is pump or regulator or sensor. Hopefully your service guys can run a few similar tests and determine what needs to go.

Posted on Feb 21, 2010

  • Kevin Challenger
    Kevin Challenger Aug 03, 2012

    I told my service guy the code I got from my code reader, and he replaced the fuel pressure sensor. Problem is now solved.

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Getting p0193 code for my 2005 ford freestar se


P0193 is "Fuel Rail Pressure Sensor Circuit High Input"
Meaning: Car's computer is reading input voltage from the FRP (Fuel Rail Pressure) sensor as
voltage out of the acceptable range, because the voltage is too above the acceptable range.

assuming you are running gasoline...

check for fuel in the vacuum hose of the FRP sensor after running engine at idle for 2 minutes. if not, check fuel pressure. Check fuel pressure by connecting a fuel pressure gauge to the Schrader
connector on the fuel rail, which you will find under a small (black, usually) plastic protective cap.

If the fuel pressure is indeed too high, your fuel pressure regulator has gone bad.

if fuel pressure is good, check voltage between Sensor connector Vref (Pin#3 LB (light blue)) and
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The acceptable voltage range from the FRP sensor to the car's computer is 4.0-5.5 volts.
What the P0193 code is saying is that the voltage from the FRP sensor is over 5.5 volts,
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If voltage from the FRP sensor is bad (out of range high, presumably), then replace the FRP
sensor and reset the OBD-II code.

If the voltage output from the FRP sensor is also good, the car's computer is kaflooey, so
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