P0131

Severity medium

AUTO

The engine control module sees a voltage that is too low from the upstream oxygen sensor on bank 1. This usually means the sensor isn’t repo

OBD-II scanner plugged into a car diagnostic port showing a trouble code
OBD-II codes: read the code, test the component, clear it and re-check.

What it means

The engine control module sees a voltage that is too low from the upstream oxygen sensor on bank 1.

How to fix P0131

  1. Visual inspection – gas cap and sensor connector
  2. Live data scan – O₂ sensor voltage
  3. Wiring continuity and resistance test

Related errors

P0137P0125P0113P0440P0442P0446P0455P0456

Source: open OBD-II DTC database

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