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What is the function of oxygen sensors?

1 Answers

Vicki

07/30/25 8:25am

The functions of the front and rear oxygen sensors mainly include the following three points: 1. The front oxygen sensor can detect the oxygen content in the exhaust and then feed the signal back to the ECU. The ECU can adjust the air-fuel ratio of the engine based on the signal. 2. The rear oxygen sensor mainly detects whether the three-way catalytic converter is working properly. The rear oxygen sensor will feed the signal back to the ECU, and the ECU will compare the data from the front and rear oxygen sensors. If the data from both sensors is the same, it indicates that the three-way catalytic converter is damaged. 3. The three-way catalytic converter can reduce pollutants in the exhaust, which is very important for environmental protection.

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