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2007 mazda cx7 showing code po193. the fuel rail pressure sensor circuit has been replaced. could it be the fuel pump too?

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More than likely its your sensor . We have been replacing a few of them especially after they get water in the gas. I have only replaced 1 hp pump in 4 years.

Posted on Mar 27, 2014

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Posted on Jan 02, 2017

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lastech
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SOURCE: FUEL RAIL PROBLEM

hello,fuel rail pressure sensor located at the rear end of railing tube which all high pressure line up to injector nozzle is connected, ignition off then you can remove that part,ty

Posted on Apr 26, 2009

Sandpiper99
  • 71 Answers

SOURCE: 2005 Lincoln Town Car suffering from low fuel

The ford spec listed in the ford engine control manual is:

General Specifications Item Specification Fuel tank capacity 71.9L (19 gal) Fuel Pressure Hot restart 448-482 kPa (65-70 psi) Key ON Engine OFF (KOEO) 140-415 kPa (20-60 psi) Key ON Engine Running (KOER) 170-280 kPa (25-40 psi)

Are you measuring the fuel pressure with a mechanical gauge or are you using a scan tool . If with a mechanical gauge, does the gauge have an air purge? What symptoms does the vehicle present. If running rough you could have a fuel injector leaking. Are you measuring the fuel pressure with the key on engine off? If so, did you cycle the key a few times? Good luck

Posted on Apr 05, 2011

SOURCE: what is "fuel rail pressure

It will be on the fuel rail on top of the
engine. Have a wire connector on it
& maybe a vacuum hose

It is what it's name implies

Posted on Jul 16, 2011

ranunyenye26
  • 241 Answers

SOURCE: OBD 2 gives a po193 code

The code is for the fuel rail sensor.
Check the hose if deteriorating that probably means at least fuel vapor was leaking.
Replace the sensor and that should cure your problem.

Posted on Feb 06, 2012

Testimonial: "thanks for the heads-up....Ranu"

  • 58 Answers

SOURCE: 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?
Any information is appreciated. Thanks


Read more: http://engine-codes.com/p0193.html#ixzz263oDqwNA

Posted on Sep 10, 2012

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that is the correct diagnosis

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OBD 2 gives a po193 code


The code is for the fuel rail sensor.
Check the hose if deteriorating that probably means at least fuel vapor was leaking.
Replace the sensor and that should cure your problem.

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