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HOMESERVICE MANUALSINFINITI2019Q70 3.7 LUXE, AWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM (3.7L) (DTC/CIRCUIT DIAGNOSIS) (8 OF 9)DTC/CIRCUIT DIAGNOSISDTC P2271: O2 SENSORDTC DESCRIPTIONDTC DETECTION LOGIC
2019 Infiniti Q70 3.7 Luxe, AWD

DTC Detection Logic

2019 Infiniti Q70 3.7 Luxe, AWDSECTION DTC Detection Logic

The heated oxygen sensor 2 has a much longer switching time between rich and lean than the air fuel ratio (A/F) sensor 1. The oxygen storage capacity of the three way catalyst 1 causes the longer switching time. To judge malfunctions of heated oxygen sensor 2, ECM monitors whether the maximum voltage of the sensor is sufficiently high during various driving conditions such as fuel-cut.

G05978454Courtesy of NISSAN NORTH AMERICA, INC.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2271

Heated oxygen sensor 2 (bank 1) circuit low voltage
  • The maximum voltage from the sensor does not reach the specified voltage.
  • ECM detects the heated oxygen sensor 2 circuit is short to ground.
  • Harness or connectors

    (The sensor circuit is open or shorted)

  • Heated oxygen sensor 2
  • Fuel pressure
  • Fuel injector
  • Intake air leaks
RENDER: 1.0x

NO RELATED

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