How to Determine if an Oxygen Sensor is Good or Bad?

[CaliLynn]

Determining the condition of an oxygen sensor involves checking if the oxygen sensor is not functioning properly. Below is a detailed introduction about oxygen sensors: 1. If the oxygen sensor fails to properly send signals back to the engine and cannot control or adjust the fuel injection pulse width of the injector, it can result in either too lean or too rich air-fuel mixtures, leading to operational issues. In such cases, the oxygen sensor should be replaced promptly. 2. The primary function of an automotive oxygen sensor is to help the engine achieve the optimal air-fuel mixture. It measures the oxygen content in the exhaust gases after combustion and converts this information into a voltage signal sent to the engine's computer. This allows the engine to achieve closed-loop control based on the target air-fuel ratio. 3. The automotive oxygen sensor is a critical component in the electronic fuel injection (EFI) engine control system. It plays a key role in controlling vehicle emissions, reducing environmental pollution, and improving fuel combustion efficiency. Oxygen sensors are typically installed in the engine's exhaust pipe.