Can the front and rear oxygen sensors be interchanged?

1 Answers
DeKhloe
07/29/25 9:01pm
Front and rear oxygen sensors cannot be interchanged. Most car exhaust systems are equipped with oxygen sensors, which are installed in front of and behind the three-way catalytic converter. Oxygen sensors are crucial for vehicles; without them, the car cannot operate properly. Here is an introduction to front and rear oxygen sensors: 1. The primary function of the front oxygen sensor is to detect the oxygen content in the exhaust gases. The front oxygen sensor sends signals to the ECU, which then adjusts the air-fuel ratio based on this data. 2. The main function of the rear oxygen sensor is to check whether the three-way catalytic converter has failed. If the data sent by the front and rear oxygen sensors to the ECU are similar, it indicates that the three-way catalytic converter has failed.
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