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Home >> Infiniti >> 2023 >> QX55 Essential >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (1 Of 5) >> DTC/Circuit Diagnosis >> DTC P0090: FRP System >> DTC Description >> DTC Detection Logic
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DTC Detection Logic

NOTE: DTC P0090 may be displayed when running out of gas.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P0090

00

FUEL PUMP

(Fuel pressure regulator A control circuit/open)

Diagnosis condition

Engine running at idle

Signal (terminal)

--

Threshold

  • Fuel rail pressure remains at 1, 100 kPa (11.22 kg/cm 2 , 159.5 psi) or more during engine rev
  • Fuel rail pressure remains at 18, 500 kPa (188.7 kg/cm 2 , 2, 682.5 psi) or more during engine rev

Diagnosis delay time

5 seconds or more