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You have 2 O2 sensors on that vehicle. They are both threaded into the exhaust system, one before the catalytic converter and one after the catalytic converter. Bank 1 sensor 1 is the O2 sensor before the catalytic converter.

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8y ago
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Q: What is the location of O2 sensor bank 1 sensor 1 on a 2003 Chevy S-10 pickup 2.2L?
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