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Home >> Lexus >> 2023 >> RC F Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (3 Of 9) >> SFI System >> DTC P0191: Fuel Rail Pressure Sensor Circuit Range / Performance [09/2014 - 03/2019] >> Monitor Description

Monitor Description

Fuel Pressure Sensor Stuck Monitor 

If the fuel pressure sensor value does not follow the change in the target high pressure side fuel pressure, it is judged as a malfunction. If this malfunction is detected in 2 consecutive driving cycles, the ECM will illuminate the MIL and store this DTC.

Fuel Pressure Sensor Correlation Monitor with Barometric Pressure 

If the fuel pressure sensor value is less than or higher than the threshold value when a cold start is performed after the engine has been warmed up and then stopped, it is judged as a malfunction has occurred. If this malfunction is detected for 2 consecutive driving cycles, the ECM will illuminate the MIL and store this DTC.