P0161


2017-10-10


Description:

  • The response of the O2 sensor voltage signal is out of expected range

Possible Symptoms:

  • Vehicle may idle or run rough

  • Possible higher fuel consumption

  • Transmission may shift harshly

Possible Causes:

  • Faulty Rear Heated Oxygen Sensor Bank 2

  • Rear Heated Oxygen Sensor Bank 2 harness is open or shorted

  • Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection

  • Inappropriate fuel pressure

  • Faulty fuel injectors

  • Intake air leaks

  • Exhaust gas leaks

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:

  • Replacing the Rear Heated Oxygen Sensor Bank 2 usually takes care of the problem

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