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Home >> Infiniti >> 2012 >> FX50 >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (VK50VE) - FX50 - DTC U0101, U0113, U1003, U1001, U1024 & P006A Through P0133 / P0153 >> DTC P0131, P0151: A/F Sensor 1 >> DTC Logic >> 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 name DTC detecting condition Possible Cause
P0131 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 Air fuel ratio (A/F) sensor 1 (bank 2) circuit low voltage
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