Dtc p0191 code engine - 2004 Jeep Wrangler

Find diagnostic trouble flow chart for DTC P0191 an do the testing ! Don't guess ! And watch this guy's video FORD FUEL RAIL PSI SENSOR CODE P0193

P0300 is a random miss fire , a vacuum leak can cause this as well as low fuel pressure ! weak fuel pump , clogged fuel filter !
DTC P0171: Fuel Trim System Lean Bank 1
DTC P0174: Fuel Trim System Lean Bank 2 These two codes are saying the PCM - engine computer is see a lean condition .
DTC P0191: Fuel Rail Pressure (FRP) Sensor Performance
Circuit/System Description
The fuel pressure sensor is located on the fuel line. The fuel pressure sensor monitors the fuel pressure in the fuel line. The fuel pump flow control module (FPCM) monitors the voltage signal from the fuel pressure sensor.

You don't say what make , model an year vehicle ! These are for GM vehicles , yours could mean something else . Except the first three , those are genaric codes , same for all makes ! So can't say what this codes are P2097, and P2099 ! Can't mean this P2097 - Post Catalyst Fuel Trim System Too Rich Bank 1
P2099 - Post Catalyst Fuel Trim System Too Rich Bank 2

Anon, Trouble code P0191, You may need a good tech. with scan tool to read and test system.

• Fuel Rail Pressure Sensor Circuit Range/Performance,computer see's signal from the Fuel Rail Pressure Sensor and/or its circuit is sending erratic readings, indicating a fuel pressure condition that is abnormal. Problems could be out of gas, leaking fuel, faulty fuel pressure sensor, bad wire or plug in circuit,fuel pressure regulator, the fuel pump could be faulty also. Check the attached links,instruction and guides, Good luck
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P0191 OBD II Trouble Code

P0191 Fuel Rail Pressure Sensor Circuit Range Performance

RAV4 2001 Trouble Code p0191 probable solution Toyota Nation Forum Toyota...

code P0191 2007 Toyota Google Search

P0191 - Fuel Rail Pressure Sensor Circuit Performance (FRP) The comprehensive component monitor (CCM) monitors the FRP pressure for acceptable fuel pressure. The test fails when the fuel pressure falls below or exceeds a minimum/maximum calibrated value for a calibrated period of time. High fuel pressure.
Low fuel pressure.
Damaged FRP sensor.
Excessive resistance in circuit.
Low or no fuel.
A FRP PID value during KOER of 138 kpa (20 psi) and 413 kpa (60 psi) for gasoline or 586 kpa (85 psi) and 725 kpa (105 psi) for natural gas vehicles (NG) is acceptable. You will have to check these items to find the cause of the code. no short cuts.

You need to have the fuel pressure checked, to see if the fuel pump or fuel filter may have a problem. The code is for the Fuel Rail Pressure sensor, and the reading from it is out of range.

Remove the T connector and vacuum line at the fuel pressure sensor and direct connect the original vacuum line directly into the fuel pressure sensor. You can find this at the end of the fuel line up near the fuel rails. This T and vacuum extension line serves the A post "fuel economy gauge"... you don't need it. The tee and extension can cause vacuum leaks causing the P0191 fault.

What repairs can fix the P0191 code?

• Replacing fuel filter(s) or fuel pump
• Replacing the fuel pressure regulator
• Repairing any broken, frayed, or shorted wires that lead to the fuel pressure sensor
• Repairing corroded connector to the fuel pressure sensor
• Replacing fuel pressure sensor
• Repairing any vacuum leaks in the engine
  
  Many times this error will also occur if there already exists fuel/air problems, like your previous code 2106 means there are one or more components in your car's intake/exhaus/air/injection systems that is having serious problems

Diagnostic Test code (DTC) P0191 has a generic description which reads "Fuel Rail Pressure (FRP)Sensor Circuit Performance"

This code sets when the Powertrain Control Module (PCM) is monitoring the fuel rail pressure sensor signal under certain driving conditions. The FRP sensor varies return voltage to the PCM to indicate the fuel pressure at the fuel rail on the engine. DTC P0191 sets when the voltage received from the FRP is above or below the expected "range" or "threshold".

The possible causes of this code are:

> High fuel pressure
> Low fuel pressure
> Damaged Fuel Rail Pressure Sensor (FRP)
> Excessive resistance in FRP circuits.
> Low or no fuel

With all of that said, I would recommend that if you have more than 30,000 miles on your current fuel filter, I would try that FIRST. Replace the filter and clear the code. If the code returns, then diagnostics will need to be performed to find the actual cause.

Does it crack or is completely dead?

Go here and it will tell you how to get your codes. Actually on an 06 you can just turn the ignition on and off 3 times (dont crank the engine) and the codes will show up on your odometer. But here are all the codes. PS you can get a manual on pdftown.com for free too.

P0191 Fuel Rail Pressure Sensor Circuit Performance

http://www.allpar.com/fix/computer-codes.html