Will a Faulty Oxygen Sensor Affect Fuel Consumption?

1 Answers
DelMadeline
07/30/25 6:13am
It does affect fuel consumption. Here are specific details about the oxygen sensor: 1. Function of the Oxygen Sensor: The oxygen sensor detects the concentration of oxygen in the exhaust and sends feedback signals to the ECU. The ECU then adjusts the fuel injector's fuel injection volume to maintain the air-fuel ratio of the mixture near the theoretical value. Therefore, if the oxygen sensor malfunctions, the mixture can become too rich, leading to increased fuel consumption. 2. Timely Replacement: The oxygen sensor is used to control and monitor the fuel-to-air ratio. If it is damaged, the electronic injection system cannot regulate fuel injection properly, resulting in higher fuel consumption. It is recommended to replace the oxygen sensor every 80,000 to 100,000 kilometers.
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