DTC P0190 Fuel Rail Pressure Sensor Circuit; DTC P0192 Fuel Rail Pressure Sensor Circuit Low Input; DTC P0193 Fuel Rail Pressure Sensor Circuit High Input: Description

The fuel pressure sensor is installed on the delivery pipe. The sensor changes fuel pressure to an electrical signal and sends the signal to the ECM. Then the ECM controls the feedback of the pump discharge to maintain the fuel's target pressure between 4 and 13 MPa (40.8 to 132.6 kgf/cm² , 580 to 1885 psi). If the sensor output stops, the ECM will stop the fuel pump for high pressure and supply fuel using the low pressure side fuel pump.

Fig 1: Fuel Pressure Voltage Output Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

RESULT REFERENCE

DTC No.	DTC Detection Condition	Trouble Area
P0190	Open or short in fuel pressure sensor circuit for 5 seconds or more (1 trip detection logic)	Open or short in fuel pressure sensor Fuel pressure sensor ECM
P0192	Short in fuel pressure sensor circuit for 5 seconds or more (1 trip detection logic)	Short in fuel pressure sensor Fuel pressure sensor ECM
P0193	Open in fuel pressure sensor circuit for 5 seconds or more (1 trip detection logic)	Open in fuel pressure sensor Fuel pressure sensor ECM

HINT:

After confirming DTC P0190, use the Techstream to confirm the fuel pressure in the delivery pipe by entering the following menus: Powertrain/Engine/Data List/All Data/Fuel Press.

DTC DETECTION CONDITION AND TROUBLE AREA

Fuel Pressure (MPa)	Malfunction
Approximately 0	PR, E2 circuit short
19.6 or more	PR, VC circuit short PR circuit open E2 circuit open