What is exhaust gas oxygen concentration sensor in vehicle? All Questions › Category: Automotive Electronics › What is exhaust gas oxygen concentration sensor in vehicle? 0 Vote Up Vote Down chetan shidling asked 4 years ago I need short information. 1 Answers -1 Vote Up Vote Down chetan shidling answered 4 years ago To maintain air/fuel ratio in vehicle we require this sensor. The exhaust gas oxygen concentration sensor are two types such as Zirconium dioxide and titanium dioxide.