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OXYGEN SENSOR Bank 1 and bank 2?

Updated: 10/21/2022
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16y ago

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On my 1998 Ford Expedition XLT , There are 4 Oxygen sensors. 1 each in front of the Cats. and 1 each behing the cat. for a total of 4 Oxygen Sensors.

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Q: OXYGEN SENSOR Bank 1 and bank 2?
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