What is the measurement method for an oxygen sensor?

[LeEverett]

The measurement method for an oxygen sensor is as follows: 1. Unplug the oxygen sensor connector and use a multimeter in resistance mode to measure the resistance between pins 1 and 2 on the sensor side; 2. Locate the oxygen sensor signal wire and insert a copper wire from the cable into the corresponding pin hole; 3. Reconnect the connector and use a multimeter in DC voltage mode to measure the voltage between the copper wire and the negative terminal; 4. Start the engine and allow the coolant temperature to reach above 80°C, then maintain the engine speed at 2500 rpm multiple times and observe the voltage displayed on the multimeter. The oxygen sensor is a crucial feedback sensor in the electronic fuel injection engine control system, playing a key role in controlling vehicle exhaust emissions, reducing environmental pollution, and improving fuel combustion quality in automotive engines.