P0143

2017-10-10

Description:

  • The fault code P0143 indicates that there is an issue with the circuit that controls the oxygen sensor for bank 1, sensor 3. This may cause the engine to run poorly or not start at all.

Possible Symptoms:

  • Illuminated check engine light

  • Poor engine performance

  • Failed emission test

  • Reduced fuel efficiency

Possible Causes:

  • Faulty oxygen sensor

  • Damaged wiring or connections in the circuit

  • Loose or corroded electrical connections

  • 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 oxygen sensor

  • Check and repair any damaged wiring or connections

  • Tighten or clean any loose or corroded electrical connections

  • Replace the engine control module (ECM) if necessary

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