Bypass frp lock coolpad3622a - Cars & Trucks

5.4L engine or? 3.9 or 4.2L
Gasoline right not the LNG option.
well not all cars have them,
the service manual covers this.
the rail is square look all 4 sides
this car can be OBD2 PID scanned to the Fuel pressure sensor.
'is this good enough? called FRP
you need a real scan tool to work on modern cars.


shows all tools needed to do rail pressure tests.
Trouble Code: P0190 (4.2L V6 VIN 2 Auto)
Fuel Rail Pressure Sensor A Circuit here is a quote in the SM

2004 PCED On Board Diagnostics
2004 PCED On Board Diagnostics SECTION 5: Pinpoint Tests Procedure revision date: 03/24/2005 DD: Fuel Rail Pressure (FRP), Fuel Rail Temperature (FRT) and Fuel Rail Pressure Temperature (FRPT) Sensors Note: Repair P0230, P0231 or P0232 fuel pump DTC(s) prior to this test. Key ON, engine OFF. Access the PCM and monitor the FRP V PID. Is the voltage less than 0.25 V? Key in OFF position. For F-150 Heritage 5.4L Dedicated NGV, and Crown Victoria Dedicated NGV, GO to DD3. For E-Series Dedicated NGV, and F-150 Heritage Bi-Fuel, GO to DD30. Key in OFF position. Key ON, engine running. Idle the engine for 2 minutes. Key in OFF position. REMOVE the FRP Sensor vacuum hose. INSPECT the FRP Sensor and vacuum hose for traces of fuel. Is fuel present? Key in OFF position. INSTALL a new FRP sensor. REFER to the fuel system WARNING information. FRP Sensor connector disconnected. Key ON, engine OFF. Access the PCM and monitor the FRP V PID. Is the voltage greater than 4.5 V? Key in OFF position. INSTALL a new FRP sensor. REFER to the fuel system WARNING information. PCM connector disconnected. Measure the resistance between: FRPFRP Is the resistance less than 5 ohms?...


THERE IS ALSO A FUEL PUMP DRIVER MODULE HIDDEN

Fuel pressure outside nominal range. Check pressure at fuel rail.

Does the Vehicle start an run ? What engine does it have ? 4.0 or 4.6 L You vehicle has electronic returnless fuel system , Fuel rail pressure sensor , FPDM - fuel pump driver module . The fuel pump driver module controls the fuel by pulse width modulation
Pulsewidthmodulation (PWM) is a powerful technique for controlling analog circuits with a processor's digital outputs. PWM is employed in a wide variety of applications, ranging from measurement and communications to power control and conversion. The PCM - engine computer uses the fuel rail pressure sensor input to send commands to the FPDM .
What code ? P0--- what ?



P0190 - Fuel Rail Pressure (FRP) Sensor Circuit Malfunction Description: The comprehensive component monitor (CCM) monitors the FRP sensor to the powertrain control module (PCM) for VREF voltage. The test fails when the VREF voltage from the PCM drops to a voltage less than a minimum calibrated value. Possible Causes:

• VREF open in harness.
• VREF open in sensor.
• Vacuum leaks.

Diagnostic Aids: Verify a VREF voltage between 4 and 6 volts. Application Key On Engine Off Key On Engine Running Continuous Memory Fuel rail pressure temperature (FRPT) sensor - GO to DD26 GO to DD26 Fuel rail pressure (FRP) sensor only - - GO to DD1 Fuel rail pressure (FRP) and fuel rail temperature (FRT) sensors - - GO to DD1


P0191 - Fuel Rail Pressure (FRP) Sensor Circuit Performance Description: The comprehensive component monitor (CCM) checks the FRP 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. 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 (KOER) of 138 kPa (20 psi) to 413 kPa (60 psi) is acceptable. Application Key On Engine Off Key On Engine Running Continuous Memory Fuel rail pressure temperature (FRPT) sensor GO to DD34 Fuel rail pressure (FRP) sensor only GO to DD9 Fuel rail pressure (FRP) and fuel rail temperature (FRT) sensors GO to DD9


P0192 - Fuel Rail Pressure (FRP) Sensor Circuit Low Input Description: The comprehensive component monitor (CCM) monitors the FRP sensor circuit to the powertrain control module (PCM) for low voltage. If voltage falls below a calibrated limit for a calibrated amount of time during testing, the test fails. Possible Causes:

• FRP signal shorted to SIG RTN or PWR GND.
• Damaged FRP sensor.

Diagnostic Aids: A FRP PID value during the key on engine off (KOEO) or key on engine running (KOER) less than 0.3 volt indicates a hard fault. Application Key On Engine Off Key On Engine Running Continuous Memory Fuel rail pressure temperature (FRPT) sensor GO to DD26 GO to DD26 GO to DD39 Fuel rail pressure (FRP) sensor only GO to DD1 GO to DD1 GO to DD14 Fuel rail pressure (FRP) and fuel rail temperature (FRT) sensors GO to DD1 GO to DD1 GO to DD14


P0193 - Fuel Rail Pressure (FRP) Sensor Circuit High Input Description: The comprehensive component monitor (CCM) monitors the FRP sensor circuit to the powertrain control module (PCM) for high voltage. If voltage exceeds a calibrated limit for a calibrated amount of time during testing, the test fails. Possible Causes:

• FRP signal shorted to VREF or VPWR.
• FRP signal open.
• Damaged FRP sensor.

Diagnostic Aids: An FRP signal high condition can be caused by any number of conditions, including a short on FRP signal to VREF, a more positive voltage level, an open FRP signal or signal return. The FRP signal line is pulled up by the PCM and VREF at the sensor, and down by the sensor through SIGRTN. Application Key On Engine Off Key On Engine Running Continuous Memory Fuel rail pressure temperature (FRPT) sensor GO to DD26 GO to DD26 GO to DD39 Fuel rail pressure (FRP) sensor only GO to DD1 GO to DD1 GO to DD14 Fuel rail pressure (FRP) and fuel rail temperature (FRT) sensors
P1233 Ford Fuel Pump Driver Module Diagnostics and Repair

FPDM Live

P0193 - Fuel Rail Pressure Sensor A Circuit High Description: The comprehensive component monitor (CCM) monitors the fuel rail pressure (FRP) sensor circuit to the powertrain control module (PCM) for high voltage. The test fails if the voltage exceeds a calibrated limit for a calibrated amount of time during testing. Possible Causes:

• FRP signal short to VREF or VPWR
• FRP signal open
• Damaged FRP sensor

Diagnostic Aids: An FRP signal high condition can be caused by any number of conditions, including a short on FRP signal to VREF, a more positive voltage level, an open FRP signal or signal return. The FRP signal line is pulled up by the PCM and VREF at the sensor, and down by the sensor through SIGRTN. Application Key On Engine Off Key On Engine Running Continuous Memory All GO to Pinpoint Test DD .
Your best bet , take it to a qualified repair shop.

https://www.youtube.com/watch?v=COwNLg9phMU

http://m.youtube.com/?#
Go to you tube and look for how to install fuel pressure regulator.

fuel rail pressure sensor "a" circuit high
possible causes : frp signal shorted to vref or vpwr or frp signal open or damaged frp sensor

DTC P0190 - Fuel Rail Pressure Sensor Circuit Malfunction
Check fuel pressure with a mechanical gauge and check the reading of the Fuel Rail Pressure (FRP) sensor on the scan tool.

When cycling the ignition switch from the off to the run position without starting the engine, the fuel pressure measured on the fuel gauge should match the reading of the FRP sensor on the scan tool.

If the mechanical gauge reading is showing to more than 2 psi higher than the FRP sensor input, replace the FRP sensor.

If the values match, start the engine. With the engine idling, the mechanical gauge will indicate about 10 psi different than the FRP sensor but when the vacuum line at the sensor is disconnected, the values should again match each other.

If the pressure reading matches the FRP sensor reading and the pressure is showing a reading of 30-45 psi Key On, Engine Off (KOEO) and at idle, check for a possible fuel quality issue.

Also check the engine temperature input reading from the Engine Coolant Temperature (ECT) sensor to verify it shows a believable temperature reading.

Possible Causes:
FRP sensor connector is damaged (check pins for damage, and for moisture)
FRP sensor reference (5v) circuit is open or shorted to ground
FRP sensor has failed
Vacuum leak(s) present in the engine

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Jose.

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.