Description
OBD-II Trouble Code Description for P0191 Toyota
Fuel Rail Pressure Sensor Circuit Range/Performance
What does this mean?
OBD2 Code P0191 Toyota definition:
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.
Symptoms
Possible sumptoms of OBD code P0191 Toyota
– Engine Light ON (or Service Engine Soon Warning Light) – Engine will not start
Causes
Possible causes of OBD code P0191 Toyota
– High fuel pressure – Low fuel pressure – Damaged FRP sensor – Excessive resistance in the circuit – Low or no fuel – Wiring harness connector of the fuel pressure sensor – Fuel Rail Pressure Sensor – Fuel
Possible Solutions
The OBD2 Code Information Be Applicable For Toyota:
2013 Toyota Auris,2012 Toyota Yaris,2012 Toyota Verso-S,2012 Toyota Tacoma,2012 Toyota Prius V,2012 Toyota Prius C,2012 Toyota Prius,2012 Toyota Hilux,2012 Toyota Camry,2012 Toyota Avensis,2012 Toyota Aurion,2012 Toyota 86 GTS,2011 Toyota Tacoma,2011 Toyota Sienna,2011 Toyota Sequoia,2011 Toyota RAV4,2011 Toyota Matrix,2011 Toyota Highlander,2011 Toyota Corolla,2011 Toyota Avalon,2011 Toyota Auris HSD,2010 Toyota iQ3,2010 Toyota Yaris,2010 Toyota Verso,2010 Toyota Tundra,2010 Toyota Prius,2010 Toyota Land Cruiser,2010 Toyota Corolla,2010 Toyota Camry,2010 Toyota Auris,2010 Toyota 4Runner,2009 Toyota iQ,2009 Toyota Yaris,2009 Toyota Venza,2009 Toyota RAV4,2009 Toyota Matrix,2009 Toyota Hilux,2009 Toyota Aygo,2009 Toyota Avensis,2009 Toyota Aurion,2009 Toyota 4Runner,2008 Toyota Sequoia,2007 Toyota Tundra,2007 Toyota Avensis,2006 Toyota RAV4,2006 Toyota Aurion,2005 Toyota Corolla Sedan,2004 Toyota Prius,2004 Toyota Corolla,2003 Toyota RAV4,2003 Toyota Land Cruiser,2003 Toyota Celica
Note:
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