Question:

How can you tell if your car's oxygen sensor is failing and what are the symptoms?

Symptoms of a failing oxygen sensor may include decreased fuel economy, engine misfires, hesitation or stumbling when accelerating, rough idle, and the "Check Engine" light turning on. To confirm if the oxygen sensor is failing, you can use an OBD-II scanner to check for diagnostic trouble codes related to the sensor or use a multimeter to test the voltage output of the sensor.

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