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Home >> Nissan-Datsun >> 2019 >> Versa Note S >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (1 Of 3) >> DTC/Circuit Diagnosis >> DTC P0131:A/F Sensor 1 >> DTC Description >> DTC Detection Logic

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 content

DTC detecting condition

Possible Cause

P0131

Air fuel ratio (A/F) sensor 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
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