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Ford 04 v6 explorer with this problem.... po 0193 fuel rail pressure high input

It's a 2004 ford explorer that had stalling out problem. we fixed the other 2 codes po 174 system too lean bank 2 & po 171 system too lean bank 1. now i need help figuring out what the po 0193 fuel rail pressure high input means n what may be wrong.

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Posted on Jan 02, 2017


SOURCE: i am having a problem with a 2001 ford windstar.

Two bad O2 sensors is rare. The problem is before the sensor,intake vacuum leak, injector lower o-ring, IMCR stuck open or the control rod is off, vacuum hose(s) off, or MAF sensor. If this has a plastic upper intake, they had problems with o-rings.

Posted on Oct 07, 2009

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SOURCE: check engine light on computer codes 171 174

switch, we run off snitches. 171 174 banks 1 & 2 Lean. Most likely cause are Upper Intake Manifold Gaskets, failed seals. It's not 1990 on. It's 1996 and on OBD2.

Posted on Nov 03, 2009

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SOURCE: my check engine light came on 2004 ford taurus had

P174 means Oxygen sensor was slow in switching Single, Right or Rear HO2S - Fuel control

P171 means Oxygen sensor not switching - system was at adaptive limits - Single, Right or Rear HO2S - Fuel control

for a comprehensive code listing for your car.

Please rate this solution.

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Posted on Jan 08, 2010

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SOURCE: My 2000 Ford Ranger keeps showing codes PO 171 and

These codes mean that the oxygen sensor is reading too "Lean" on both the left and right cylinder banks and the engine control system can't compensate any further to solve the problem. You may have a dirty or failing Mass Airflow Sensor that is miscalcuating the amount of airflow the engine is taking in which in turn can cause both of these codes to set. If the sensor is reporting less air than the engine is actually taking in then the engine computer will add only the amount of fuel it should based on what it was told by the sensor which will cause both cylinder banks to run "lean". There could be something else going on such as having two bad oxygen sensors [very rare] but I do see these two codes together quite often and usually its the sensor that is causing it. Hope this helps a bit!

Posted on Jul 12, 2010

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SOURCE: PO 174 Sys to lean


The check engine codes reproted are telling you that the mixture has too much air (lean mixture). Test and eventually repair or replace parts that may be contributing to the problem.

Test fuel pump and fuel pressure. If fuel delivery is not regular or if pump is broken you may get a lean code from the O2 sensors. Fuel pressure is tested placing an hand pressure gauge within fuel lines.
Ensure that distribution is OK and that there is no misfire. In that case you should get a msfire code along with the lean code, but you never know the misfire does not get detected by PCM (main computer).
Check air intake and sensors, if the MAF or AIT sensors are not connected or malfunctioning you can get a lean mixture.
Check the vacuum system. If there is a leak, then the vacuum will be sucking air from the leak and this may return a lean code.
Check IAC and EGR valves.

I think I listed all most common factors that can return a lean code from both O2 sensors ( that tells you that the sensors are OK).

Posted on Sep 08, 2010

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Ford 04 v6 po 0193 fuel rail pressure high input

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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

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Fuel rail system pressure too high ford freestar 04'. Is the high pressure sensor bad or is there a pressure regulator that whet bad?

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What is the data reading on the Fuel Rail Pressure Transducer sensor?
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May 13, 2011 | Ford Freestar Cars & Trucks

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P0193 fuel rail pressure circuit high input

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

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

Hope this helps (remember to rate this answer).

Jan 12, 2011 | 2004 Ford Explorer Sport Trac

2 Answers

I have a dodge truck 2004 cummins engine with codes reading. p o 0191, 0193, 0652, 0341, 0069 can you tell me what all the codes mean?

0191 is fuel rail pressure sensor circuit range/performance 0193 fuel rail sensor circuit high input 0652 sensor reference voltage b circuit low 0341 cam shaft position sensor a circuit range/performance (bank1 or single sensor) and 0069 map barometric pressure correlation
i hope that helps you some what

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Where is the fuel pressure regulator on a 2004 explorer with v6

Along the fuel rail; after the fuel injectors...


Fig. Fuel pressure relief valve-4.0L SOHC engine

Good luck (remember comment and rated this).

May 29, 2010 | 2004 Ford Explorer

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