How to Tell if the Oxygen Sensor is Faulty

1 Answers
DelColin
07/30/25 12:39am
Cars with faulty oxygen sensors will experience reduced power performance and a significant increase in fuel consumption. Additionally, it can lead to rapid damage of the catalytic converter, greatly shortening its service life. Below is relevant information about automotive oxygen sensors: 1. Function: The oxygen sensor is an essential component for reducing exhaust emissions. Once the air-fuel ratio of the mixture deviates from the theoretical value, the oxygen sensor detects the oxygen concentration in the exhaust and sends feedback to the ECU. This feedback controls the fuel injector's fuel delivery, maintaining the air-fuel ratio within the normal range. 2. Principle: The oxygen sensor calculates oxygen concentration through chemical equilibrium to monitor the air-fuel ratio of the mixture. Therefore, if the oxygen sensor fails, it cannot monitor the vehicle's exhaust emission values. The core component of the oxygen sensor is a porous ZrO2 ceramic tube. At certain temperatures, high-concentration oxygen molecules inside the tube can be adsorbed to form electrons, creating a potential difference.
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