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What is the Function of an Automotive Oxygen Sensor?

2 Answers

JohnnyRose

07/29/25 2:44am

Automotive oxygen sensors are critical feedback sensors in electronically fuel-injected engine control systems. Their primary roles include controlling vehicle exhaust emissions, reducing environmental pollution caused by automobiles, and improving the fuel combustion quality of car engines. Below are precautions for using oxygen sensors: 1. Drive smoothly under normal circumstances: Unless in emergencies or poor road conditions, minimize severe vehicle shaking and impacts, and avoid scraping the undercarriage (especially near the exhaust system). Since oxygen sensors contain ceramic sensing elements, severe shaking or impacts may damage these components. 2. Pay attention to sensor wiring: During routine vehicle maintenance, ensure that wiring is not excessively pulled. If the wiring is compromised, leading to unreliable connections, it may affect the normal operation of the oxygen sensor. 3. Be cautious when washing the car after turning off the engine: The exhaust pipe becomes very hot during vehicle operation. If the exhaust system is rinsed during car washing, the rapid cooling caused by external factors may lead to the cracking of the ceramic sensing elements in the oxygen sensor.

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ArcherLee

08/12/25 6:40am

That oxygen sensor plays a crucial role in vehicles. Positioned like a precision detector in the exhaust pipe, it continuously monitors the unburned oxygen levels in emissions. This data is instantly transmitted to the ECU, allowing it to adjust fuel injector pulse width and maintain the optimal air-fuel ratio around 14.7:1. This ensures more complete combustion, smoother power delivery, and improved fuel efficiency. Modern vehicles may employ advanced wideband sensors with faster response times and higher accuracy. Maintaining sensor functionality is vital - malfunction can cause rough idling, poor acceleration, and potentially lead to excessive emissions. Regular maintenance checks for carbon buildup can significantly extend its service life.

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