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Home >> Subaru >> 2021 >> Ascent Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (2 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0191: Fuel Rail Pressure Sensor Circuit Range/Performance Bank 1 >> General Description >> Diagnostic Method

Diagnostic Method

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Main fuel pressure - Sub fuel pressure! 2.24 MPa (16804 mmHg, 662 inHg) or more

Time needed for diagnosis:  2500 ms

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