How to Clean an Oxygen Sensor?
2 Answers
Oxygen sensor cleaning steps: First, remove the oxygen sensor from the exhaust pipe, then soak it in a 5% to 10% concentration of 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 clear. Additionally, observe the bottom of the oxygen sensor; if the internal carrier appears white after cleaning, it indicates that the oxygen sensor has largely regained its activity. If the oxygen sensor malfunctions, the electronic fuel injection system's computer cannot obtain accurate information about the oxygen concentration in the exhaust pipe, leading to an inability to perform feedback control on the air-fuel ratio. Over time, this can easily result in engine issues such as unstable idle, misfires, and surging.
Cleaning the oxygen sensor is actually quite simple. Here's a method I learned from an experienced car enthusiast: First, locate the sensor, usually near the exhaust pipe, and slowly unscrew it with a wrench, being careful not to apply too much force to avoid damaging the threads. Then, prepare some gasoline or a specialized cleaner and soak the sensor in it for half a day to soften the carbon deposits. After that, use a soft-bristled toothbrush to gently clean the ceramic tip, avoiding metal tools to prevent scratches. Once cleaned, rinse it thoroughly and let it dry completely before reinstalling. Start the car to see if the engine light turns off. Last time I cleaned mine, it saved me the cost of a new one, but if the readings remain inaccurate after multiple attempts, you might need to buy a new one. Remember to stay safe by wearing gloves and working in a well-ventilated area. This method is suitable for those with good DIY skills, as the sensor is quite delicate and cleaning carries some risks. Beginners are better off seeking professional help to avoid mistakes.
