Oxygen Sensor Monitor In simple terms, the Oxygen Sensor’s only job is to monitor how much oxygen is in the vehicle’s exhaust stream. The ECM uses this information to determine how good of a job it did in calculating the air/fuel ratio based on the current driving conditions (outside air temperature, engine temperature, accelerator pedal position, air mass, etc.). Based on the results, the ECM makes changes to future air/fuel calculations. How oxygen sensors work Carmakers use various types of oxygen sensors, with the most recent designs called air/fuel ratio … Read More
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