P0191 car doesn't start and check engine light is on with code p0191

https://www.yourmechanic.com/article/p0191-obd-ii-trouble-code-fuel-rail-pressure-sensor-circuit-range-performance-by-jamahl-walker

P0191 Ford Fuel Rail Pressure Sensor Circuit Range Performance

SENSOR 1 ??????????? There is no sensor one involved here . After replacing all those parts an not fixing the problem ,suggest you take it to a qualified repair shop. The proper thing to do would be to do the diagnostic's for code P0191 . Do you know what a factory diagnostic flow chart is ? How to test electrical circuits ?

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 A Circuit Range/Performance , Description: The comprehensive component monitor (CCM) checks the fuel rail pressure (FRP) sensor for an 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. Possible Causes:

• High fuel pressure
• Low fuel pressure
• Damaged FRP sensor
• Excessive resistance in the circuit
• Vacuum leaks
• Low or no fuel

Diagnostic Aids: A FRP PID value during key ON, engine running of 138 kPa (20 psi) to 413 kPa (60 psi) is acceptable. Application Key On Engine Off Key On Engine Running Continuous Memory All GO to Pinpoint Test DD .

code p0191 refers to rail pressure(FRP) sensor--range/performance problem===causes-- wiring-- FRP sensor.
check for air in the fuel system after a filter change
check FRP sensor and wiring is connected properly.

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

Hello! the P1506 is indicating a defective Idle Air Control (IAC) valve,,,P0191 is indicating a fuel rail pressure sensor (FRPS) fault...I suspect a cause and effect on the two codes...
Cause= IAC...Effect= FRPS....See photo below...Remove and clean with throttle body spray cleaner before you purchase a new one...It may only be blocked with carbon...Guru..Saailer



ACDELCO Part # 2171810 Cost $70

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

I would start by looking for a broken vacuum hoses. That would cause 2 of the codes. The other 2198 is stating that the o2 is stuck rich. Look for the vacuum leak and let me know when you have that or if you do not find one.

Replacement of the fuel pump would be the case here,unless the fuel filter needs to be changed.To find out,remove the fuel filter,and blow threw it with your mouth,kinda tast bad but it will tell you if the fuel filter is restricted.You should be able to blow threw it easy.

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