How to Test if an Oxygen Sensor is Good or Bad

1 Answers
DelElliana
07/30/25 8:26am
Methods for measuring an oxygen sensor are as follows: 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 approximately 2500 rpm for about 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 and extinguishing status of the indicator light on the oxygen sensor tester, you can determine whether the sensor is in normal working condition.
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