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Home >> Infiniti >> 2022 >> QX80 Premium Select, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (2 Of 5) >> Engine (ECM) >> DTC P0151: A/F Sensor 1 >> DTC Description >> DTC Detection Logic
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DTC Detection Logic

To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1 signal is not inordinately low.

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible Cause

P0131

A/F SENSOR1 (B1)

[Air fuel ratio (A/F) sensor 1 (bank 1) circuit low voltage]
  • The A/F signal computed by ECM from the A/F sensor 1 signal is constantly approx. 0 V.
  • Harness or connectors

    (The A/F sensor 1 circuit is open or shorted.)

  • A/F sensor 1

P0151

A/F SENSOR1 (B2)

[Air fuel ratio (A/F) sensor 1 (bank 2) circuit low voltage]
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