What does the post, or downstream, oxygen sensor (HO2S) measure? A) Amount of H₂O in front of the catalytic converter B) Amount of H₂O behind the catalytic converter C) Amount of oxygen in front of the catalytic converter D) Amount of oxygen behind the catalytic converter

Question

Quizplus · Accepted Answer

The post or downstream oxygen sensor (HO2S) measures the amount of oxygen behind the catalytic converter. This helps to determine if the catalytic converter is functioning properly to reduce harmful emissions.

What Does the Post, or Downstream, Oxygen Sensor (HO2S) Measure