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Fits the Following Vehicles: 1999-2000 Chevrolet S10 2.2L 1999-2000 GMC Sonoma 2.2L 1999-2000 Isuzu Hombre 2.2L Descriptions: The oxygen sensor measures the amount of oxygen in the exhaust gasses that exit the engine. It sends real-time data about the amount of unburnt oxygen in the exhaust system to the engine's computer to determine the correct air-to-fuel ratio for the car's engine. Q&A: 1.How to change an oxygen sensor? .
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