P0131

2017-10-10

Description:

  • The fault code P0131 indicates that there is a low voltage output from the oxygen (O2) sensor circuit for bank 1 sensor 1. This may cause the engine to run poorly, increase emissions or fail a smog test.

Possible Symptoms:

  • Illuminated check engine light

  • Poor engine performance

  • Increased emissions

  • Failed smog test.

Possible Causes:

  • Faulty O2 sensor

  • Damaged wiring or connections in the O2 sensor circuit

  • Exhaust leaks ahead of the O2 sensor

  • Failed engine control module (ECM)

Related Parts:

  • Oxygen Sensor: This is one of the parts that fails very commonly. It measures the amount of oxygen to ensure proper combustion. Problems in the Oxygen Sensor lead to poor fuel economy

Possible Solutions:

  • Replace the O2 sensor

  • Check and repair any damaged wiring or connections

  • Fix any exhaust leaks ahead of the O2 sensor

  • Replace the engine control module (ECM) if necessary

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