Question about 2004 Ford Freestar

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I have a 2004 ford freestar. P0193 code. Replaced fuel filter and worked for.short time. Light back on. Runs fine for most part just stumbles on acceleration once or twice a tank of gas. Usually when it gets low. So regulator,fuel pump, sensor? I am not sure where to start.

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PO193 ---Fuel Rail Pressure Sensor Circuit
High Input (FRP)

Check Fuel Pressure at Rail

Posted on Mar 22, 2011

  • kenny7214 Apr 05, 2011

    What is fuel pressure at "Rail"?

  • Anonymous Apr 05, 2011

    Valve on engine where you check
    fuel pressure

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I have 2004 Ford explorer that gave same code I change fuel filter fuel pump and fuel pressure sensor.. but still does the same symptoms as Kenny..

Posted on May 02, 2012

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Posted on Jun 07, 2015

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P0193 - fuel rail pressure sensor circuit high input


Possible causes- Excessive resistance in the circuit
- Low or no fuel
- Wiring harness connector of the fuel pressure sensor
- Fuel Rail Pressure Sensor
- Fuel Pump
help.png Help with thisSymptoms- Engine Light ON (or Service Engine Soon Warning Light)
- Engine will not startP0193 DescriptionThe 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.P0193 Information for specific makesP0193 FORD
P0193 HONDA
P0193 ISUZU
P0193 MAZDA
P0193 LEXUS
P0193 VOLKSWAGEN
Need more help?Do you need more help with the P0193 code? ask a question to all or users or search the top hand picked automotive forums for more information

(You will add more details to the question in the next step)ororAsk your facebook friendsNeed parts?Need parts to fix the P0193 code? Search hundreds of stores at the same time and compare prices

Help Engine-Codes.comHelp us improve Engine-Codes.com leave a comment below. Did the information help you fixing the P0193 code? What are the symptoms for the P0193 code? Have you replaced any parts?
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Read more: http://engine-codes.com/p0193.html#ixzz263oDqwNA

Sep 10, 2012 | 2005 Hyundai Tucson

1 Answer

Diagnostic code p0193


P0193 FORD - Fuel Rail Pressure Sensor Circuit High Input
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Engine will not start Possible causes - Excessive resistance in the circuit
- Low or no fuel
- Wiring harness connector of the fuel pressure sensor
- Fuel Rail Pressure Sensor
- Fuel Pump

Mar 17, 2012 | 2004 Ford Explorer Sport Trac

2 Answers

2005 freestar emission lite on code P10191&P193


Both codes P0191 and P0193 on Ford means Fuel Rail Pressure Sensor Circuit High Conditions. That means that the PCM detected that the FRP sensor signal was more than 4.5v.

Possible causes:
* FRP signal shorted to VREF or VPWR.
* FRP signal open
* Damaged FRP sensor.
* Damaged PCM.

Check ground connections.

Sep 12, 2011 | Ford Freestar Cars & Trucks

1 Answer

I have a 2004 Ford Explorer XLT 4x4 v6 sohc. I have had a service engine light for a couple months. Initially it was giving a P0191 and P0193 code - dealership said replace Fuel pump and filter. So I took...


Check the pressure regulater...Also make sure there is no kinks in the line..You really need to see a data stream instead of just codes..Alot of time people see a code and replace part you need to watch the pressures and see whats going on..Look make sure the vacuum line on the regulator is ok

Sep 09, 2011 | 2004 Ford Explorer

1 Answer

Have a 2004 hyndia sonata just repaced fuel filter after engine light came on..worked fine for 1 day now engine light back on and runs rough at times doesnt start right away


You are describing low fuel pressure (fuel pump) problem. When you say you replaced the fuel filter, where did you find this filter on the 2004 Sonata? The problem, there is no Fuel Filter, per se, there is a 'SOCK' at the bottom of the fuel pump assembly which serves as a filter, inside the fuel tank. By the way, you mentioned the Check Engine Light came on. Did you scan for any codes in the computer (ECU)? If you did, what were the codes?

Feb 07, 2011 | Hyundai Motor 2004 Sonata

1 Answer

2005 freestar driving down the road suddenly starts stumbling rpms drop and emission light comes on then dies. Scaned it but says nothing is wrong


The check engine light will always come on when the engine stalls.It could be your fuel filter needs replaced or your fuel pump is going out. The fuel pumps can heat up and stop working, then after they have a chance to cool off they will work just fine until they get hot again.

Sep 14, 2010 | 2005 Ford Freestar

1 Answer

Fuel rail pressure sensor chkt high input p0193


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.

Feb 12, 2010 | 2004 Ford Freestar

1 Answer

My 2004 ford freestar van is hesitating going down the road. i change the egr valve . could it be the fuel filter


most likely not the fuel filter- try plugs and wires... could be a number of things, if the vehicle runs fine while in park and doesnt hesitate, most likely is sprk plugs and wires or a transmission problem...

Jun 25, 2009 | 2004 Ford Freestar

2 Answers

Fuel rail pressure sensor chkt high input p0193


how to repair a Ford Freestar fuel rail pressure sensor

Apr 30, 2009 | 2005 Ford Freestar

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