P0042

2017-10-10

Description:

  • The fault code P0042 indicates there is an issue with the heating circuit of the oxygen sensor in bank 1, sensor 3. This may cause the engine to run poorly, reduce fuel efficiency, or not start at all.

Possible Symptoms:

  • Illuminated check engine light

  • Reduced fuel efficiency

  • Poor engine performance

  • Engine may not start

Possible Causes:

  • Failed oxygen sensor heating element

  • Damaged or corroded wiring or connections in the circuit

  • Failed engine control module (ECM)

Related Parts:

  • Heated 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 in the circuit

  • Replace the engine control module (ECM) if necessary

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