How to Measure an Oxygen Sensor?

1 Answers
LeZoey
07/29/25 7:18pm
Measuring an oxygen sensor can be done using the following methods: 1. Multimeter Resistance Measurement Method: This method utilizes the resistance characteristics of the oxygen sensor to determine its resistance value in both warmed-up and non-warmed-up states, thereby assessing whether it is damaged. 2. Multimeter Voltage Measurement Method: Maintain the engine speed at around 2500 rpm for approximately 90 seconds, then use a multimeter to measure the voltage at the oxygen sensor's signal output terminal. 3. Oxygen Sensor Tester Inspection Method: By observing the flashing or extinguishing of the indicator light on the oxygen sensor tester, you can determine whether the sensor is functioning normally. The oxygen sensor is a critical feedback sensor in the electronic fuel injection engine control system. It plays a key role in controlling vehicle exhaust emissions, reducing environmental pollution caused by automobiles, and improving the fuel combustion quality of the car engine.
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