What is the Function and Malfunction of an Oxygen Sensor?

[PaisleeAnn]

Oxygen sensor's functions are: 1. To measure whether there is excess oxygen in the exhaust after engine combustion, converting the oxygen content into a voltage signal transmitted to the engine computer, enabling the engine to achieve closed-loop control targeted at the excess air factor; 2. To ensure that the three-way catalytic converter has conversion efficiency for all three pollutants in the exhaust—hydrocarbons, carbon monoxide, and nitrogen oxides—thereby transforming and purifying emission pollutants. The malfunctions of an oxygen sensor are: 1. Unstable idle speed and excessive fuel consumption; 2. Significant damage to the oxygen sensor can lead to insufficient engine power, sluggish acceleration, and black smoke from the exhaust. Oxygen sensors are used in industries such as petroleum, chemical, coal, metallurgy, papermaking, firefighting, municipal, pharmaceutical, automotive, and gas emission monitoring.

[VanCamille]

Once while driving, I suddenly noticed the engine was unusually noisy and the fuel consumption had inexplicably increased. Later, at the repair shop, they found that the oxygen sensor was faulty. This component monitors the oxygen levels in the exhaust pipe, helping the engine automatically adjust the fuel-air mixture ratio, which ensures the car runs efficiently and environmentally friendly. If it malfunctions, the engine warning light might come on, the idle could become unstable, or acceleration might feel sluggish, significantly affecting daily driving. I’ve also heard common causes of failure include the sensor getting clogged with exhaust soot or aging wiring leading to signal failure. Regular maintenance should include cleaning the sensor area, otherwise repairs can be quite troublesome. Despite its small size, I think this little component is crucial for both driving experience and your wallet.

[Baker]

I enjoy tinkering with cars and have replaced oxygen sensors several times. It primarily detects the oxygen concentration in the exhaust pipe, transmits the data to the computer to control fuel injection, making engine combustion more efficient. When faulty, it usually starts with the check engine light, and symptoms like a sudden surge in fuel consumption or increased black smoke are typical signs. Diagnosing the issue isn't complicated—just use a multimeter to measure resistance or voltage. During replacement, you'll need to disassemble parts near the exhaust pipe, being careful not to burn yourself. Common problems include carbon buildup covering the sensor or loose wiring connections. If not addressed promptly, the entire exhaust system could be affected, increasing tailpipe pollution. I recommend novice car owners regularly monitor engine parameters to save on repair costs.

[IkerAnn]

I am particularly concerned about the environmental impact of cars. The oxygen sensor plays a crucial role in the vehicle, as it continuously monitors the oxygen levels in the exhaust, helping the engine maintain optimal combustion balance and reduce harmful emissions such as carbon monoxide. When a malfunction occurs, exhaust treatment fails, leading to increased air pollution, which negatively affects both the surrounding environment and health. Common issues include sensor failure causing reduced efficiency of the catalytic converter and even triggering warning lights. During maintenance, it is important to regularly check the sensor's cleanliness to prevent pollutant buildup and extend its lifespan.