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Home >> Infiniti >> 2023 >> QX55 Essential >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System (DTC/Circuit Diagnosis) (2 Of 5) >> DTC/Circuit Diagnosis >> DTC P0172: Fuel Injection System Function >> DTC Description >> DTC Detection Logic
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DTC Detection Logic

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P0172

00

FUEL SYS-RICH-B1

(System too rich bank 1)

Diagnosis condition

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Signal (terminal)

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Threshold

  • Direct fuel injection system does not operate properly
  • The amount of mixture ratio compensation is too large. (The mixture ratio is too rich.)

Diagnosis delay time

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