P119B Code: Meaning, Causes, and Symptoms | OBD2 Codes

P119B – Fuel Rail Pressure Sensor Malfunction

 

P119B Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

P119B Possible Causes

 

Faulty Fuel Rail Pressure Sensor,Fuel Rail Pressure Sensor harness is open or shorted,Fuel Rail Pressure Sensor circuit poor electrical connection

 

P119B Description

 

The fuel rail pressure (FRP) sensor is placed to the fuel rail and measures fuel pressure in the fuel rail. The sensor transmits voltage signal to the Engine Control Module (ECM). As the pressure increases, the voltage rises. The ECM controls the fuel pressure in the fuel rail by operating high pressure fuel pump. The ECM uses the signal from fuel rail pressure sensor as a feedback signal. The Engine Control Module (ECM) monitors the Fuel Rail Pressure Sensor. The ECM sets the OBDII code when the Fuel Rail Pressure Sensor is not to factory specifications.