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Home >> Infiniti >> 2017 >> QX80 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (1 Of 4) >> DTC/Circuit Diagnosis >> DTC P0090: High Pressure Fuel Pump >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

NOTE:
  • If DTC P0090 is displayed with DTC P1197, first perform the trouble diagnosis for DTC P1197.
  • DTC P0090 may be displayed when running out of gas.
DTC No. Trouble diagnosis name
(Trouble diagnosis content)		 DTC detecting condition Possible cause
P0090 FUEL PUMP
(High pressure fuel pump circuit)
  • Fuel rail pressure remains at 1.5 MPa (15 bar, 15.3 kg/ cm2 , 217.5 psi) or less for 3 seconds or more during engine rev.
  • Fuel rail pressure remains at 18.5 MPa (185 bar, 188.7 kg/ cm2 , 2682.5 psi) or more for 0.3 seconds or more during engine rev.
  • Harness or connectors

    (The fuel pump circuit is open or shorted.)

  • High pressure fuel pump
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