Can the front and rear oxygen sensors be interchanged?

[HaydenDella]

Front and rear oxygen sensors cannot be interchanged. The car's exhaust system is equipped with oxygen sensors, which are installed before and after the three-way catalytic converter. These sensors are crucial for the vehicle's operation; without them, the car cannot function properly. The oxygen sensor located before the three-way catalytic converter is called the front oxygen sensor, while the one behind it is called the rear oxygen sensor. The primary function of the front oxygen sensor is to detect the oxygen content in the exhaust gases. It sends signals to the ECU, which then adjusts the air-fuel ratio based on this data. The rear oxygen sensor is mainly used to detect whether the three-way catalytic converter has failed. If the data transmitted to the ECU by both the front and rear oxygen sensors are the same, it indicates that the three-way catalytic converter has failed.