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Home >> Infiniti >> 2021 >> QX50 Essential, 4WD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (4 Of 5) >> DTC/Circuit Diagnosis >> DTC P21F5: Fuel Control System B Bank 1 >> DTC Description >> DTC Detection Logic
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DTC Detection Logic

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P21F5

00

Fuel control system B bank 1

(Fuel Control System B Too Rich Off Idle Bank 1)

Diagnosis condition

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Signal (terminal)

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Threshold

  • Direct and port 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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