Will the engine malfunction light come on if the oxygen sensor is faulty?

1 Answers
JocelynMarie
07/29/25 11:58pm
If the oxygen sensor is faulty, the engine malfunction light will come on, and the damaged oxygen sensor should be replaced immediately. The oxygen sensor is used to detect the oxygen content in the exhaust gas. If this component is damaged, the ECU will not receive signals, making it unable to accurately adjust the air-fuel ratio. The oxygen sensor is a standard component in vehicles, utilizing ceramic sensing elements to measure the oxygen potential in the exhaust pipe. Based on chemical equilibrium principles, it calculates the corresponding oxygen concentration to monitor and control the combustion air-fuel ratio, ensuring product quality and compliance with exhaust emission standards. Oxygen sensors are widely used in various coal, oil, and gas combustion furnaces for atmosphere control. They are currently one of the best methods for measuring combustion atmosphere, offering advantages such as simple structure, rapid response, easy maintenance, convenient use, and accurate measurement.
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