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