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Home >> Infiniti >> 2021 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (2 Of 5) >> Engine (ECM) >> DTC P0191: FRP Sensor >> DTC Description >> DTC Detection Logic

DTC Detection Logic

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0191

Fuel rail pressure sensor

Fuel rail pressure remains at more than 14.5 MPa (147.9 kg/cm 2 , 2102.5 psi) for 0.2 seconds or more during ignition ON.

  • Harness or connectors

    (Fuel rail pressure sensor circuit is open or shorted.)

  • Fuel rail pressure sensor
  • Sensor power supply 3