What is the replacement interval for an oxygen sensor?

1 Answers
VanFelicity
07/30/25 2:24am
Oxygen sensors typically need replacement after 100,000 kilometers. Their primary function is to control vehicle exhaust emissions, effectively reducing environmental pollution caused by automobiles. The working principle of an oxygen sensor involves using a ceramic sensing element to measure the oxygen potential in a furnace or exhaust pipe. Based on chemical equilibrium principles, it calculates the corresponding oxygen concentration to monitor and control the air-fuel ratio during combustion, ensuring product quality and compliance with exhaust emission standards. The testing method for an oxygen sensor includes: 1. Disconnect the oxygen sensor plug; 2. Use a multimeter set to resistance mode to measure the resistance between pins 1 and 2 of the sensor plug; 3. A normal resistance value ranges between 4 and 40 ohms. If the resistance is outside this range, the oxygen sensor should be replaced.
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