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Home >> Infiniti >> 2017 >> QX80 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (2 Of 4) >> DTC/Circuit Diagnosis >> DTC P0191: FRP Sensor >> DTC Logic >> 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/cm2 , 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