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What are the consequences of a faulty oxygen sensor?

1 Answers

RicardoLynn

07/30/25 7:42am

Once the oxygen sensor fails, the computer of the electronic fuel injection system will not be able to obtain information about the oxygen concentration in the exhaust pipe, thus unable to perform feedback control on the air-fuel ratio. This will lead to increased engine fuel consumption and exhaust pollution, as well as engine issues such as unstable idling, misfires, and surging. More information about the oxygen sensor is as follows: 1. The location and function of the oxygen sensor: The front oxygen sensor is located at the exhaust manifold and is used to adjust the mixture concentration. The rear oxygen sensor is located behind the three-way catalytic converter and is used to monitor the working condition of the three-way catalytic converter. 2. Replacement cycle of the oxygen sensor: There is no fixed replacement cycle for the oxygen sensor, but it is recommended to replace the oxygen sensor for vehicles with over 100,000 kilometers.

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