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Home >> Subaru >> 2019 >> WRX Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (Except For STI) (2 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0191: Fuel Rail Pressure Sensor Circuit Range/Performance Bank 1 >> Diagnostic Method

Diagnostic Method

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Minimum HPFR pressure sensor output voltage
(Fuel pressure)< 3.863 MPa
> 1.015 V
Minimum HPFR pressure sensor output voltage
(Fuel pressure)< -2.011 MPa
> 0.232 V

Time needed for diagnosis:  Less than 1 second

Malfunction indicator light illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.