Where is the oxygen sensor located in a car?

1 Answers
EstherRose
07/25/25 5:16am
The oxygen sensor in a car is installed at the position of the engine exhaust pipe. Types of oxygen sensors: Oxygen sensors are actually divided into two types, front and rear, both of which are installed at the position of the engine exhaust pipe. Taking the three-way catalytic converter as the boundary, the front oxygen sensor is located before the three-way catalytic converter, while the rear oxygen sensor is located after it. Function of the rear oxygen sensor: The main function of the rear oxygen sensor is to detect the oxygen concentration in the exhaust gas after purification by the three-way catalytic converter. If the oxygen concentration data obtained by the front oxygen sensor and the rear oxygen sensor are the same, it indicates that the three-way catalytic converter has failed.
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