How to Clean an Automotive Oxygen Sensor?
2 Answers
Methods for cleaning an automotive oxygen sensor: First, remove the oxygen sensor from the exhaust pipe, then soak it in a ferric chloride hydrochloric acid solution for approximately 10 to 15 minutes before taking it out. Finally, rinse it thoroughly with clean water. After cleaning, ensure that the four surrounding holes are unobstructed. Additionally, observe the bottom of the oxygen sensor; if the internal substrate appears white after cleaning, the oxygen sensor has essentially regained its activity. The oxygen sensor is used to detect the oxygen concentration in the exhaust and sends feedback signals to the ECU. The ECU then adjusts the fuel injection volume to maintain the air-fuel ratio of the mixture near the theoretical value.
Cleaning a car's oxygen sensor sounds simple but carries certain risks. I've tried DIY at home a few times: first remove the sensor, soak it in specialized cleaner for a few minutes to remove carbon deposits, then let it dry thoroughly before reinstalling. Tools needed include wrenches and cleaning solvents like gasoline or acetone, but caution is required. Avoid excessive soaking as solvents can corrode internal components, potentially causing signal failure. Common symptoms of sensor failure include the engine light turning on and sudden increases in fuel consumption. If the problem persists after cleaning, the sensor is likely completely damaged. It's best to first check the fault code to confirm it's a sensor issue before proceeding. DIY saves money but has a low success rate; those unfamiliar with cars are advised to simply replace with a new part for peace of mind.
