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What Could Indicate That an Oxygen Sensor Needs Replacing?

- Higher Levels of Gasoline Consumption

- Engine Performance Problems, Such as Surging and Hesitating

- “Check Engine” Light Comes on While Driving

- Failed Emissions Test

- Damaged Catalytic Converter

- Loss of Engine Power

- Engine Sputters While Accelerating or Idling

What is an Oxygen Sensor?

An oxygen sensor, or O2 sensor, is an electronic device in your vehicle’s exhaust system that measures the amount of oxygen present in the exhaust. It can detect if the engine is running rich (too much fuel) or lean (too much air) and adjust accordingly, in real time. In addition, oxygen sensors are used alongside catalytic converters to reduce exhaust emissions. Depending on your vehicle’s make and model, you might have two or more oxygen sensors working simultaneously along different points of the exhaust system.

How long does an oxygen sensor last?

Extreme heat, debris, and contaminants in the exhaust have the potential to wear on an oxygen sensor and eventually cause it to malfunction, at which point it would need to be replaced. Generally, an oxygen sensor should last around 75,000 - 100,000 km, however with proper vehicle maintenance it is possible for a sensor to last quite a bit longer.

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