What is the maintenance method for the oxygen sensor?
2 Answers
The maintenance method for the oxygen sensor is: By observing the amplitude and frequency of the voltage changes of the oxygen sensor, you can determine whether the oxygen sensor is functioning properly. To check if the oxygen sensor is working correctly, you can use a fault diagnostic tool. After starting the engine and allowing it to reach normal operating temperature, the voltage of the oxygen sensor should fluctuate rapidly within the range of 0.1V to 0.9V, which indicates that the oxygen sensor is functioning normally. This voltage is the feedback voltage of the oxygen sensor. The oxygen sensor is a sensor found in every car. Typically, a car has two oxygen sensors—one located behind the exhaust manifold and the other behind the three-way catalytic converter. The oxygen sensor can detect the oxygen content in the exhaust, allowing the ECU to adjust the air-fuel ratio and also determine whether the three-way catalytic converter is functioning properly.
When it comes to diagnosing an oxygen sensor, as someone who tinkers with engines all day, I'm used to checking the trouble codes first—plugging a diagnostic tool into the OBD port to see if any errors pop up. If the check engine light is on, chances are it's the culprit. Next, I measure the voltage: using a multimeter to check the oxygen sensor's signal wire at idle. It should fluctuate between 0.1 and 0.9 volts—anything below 0.45 means it's faulty. Then, I inspect the heating circuit by unplugging the connector and measuring resistance, which should be between 4 and 7 ohms. Higher readings indicate a heater failure. On long drives, if you notice a sudden spike in fuel consumption or a strong exhaust smell, check it immediately—a faulty oxygen sensor throws off the fuel injection system, wasting gas and harming the engine. Lastly, try cleaning carbon buildup with a dedicated cleaner or replace it if necessary. Checking it every few tens of thousands of miles can save you a lot on fuel costs. Around 160 words.
