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The oxygen sensor heater for bank 1 on a 1998 Chevy Lumina with a 3.1L engine is typically located in the exhaust system, specifically in the exhaust manifold or just downstream of it. This sensor monitors the oxygen levels in the exhaust gases to help regulate the air-fuel mixture. To access it, you may need to lift the vehicle and remove any components obstructing access to the exhaust system. Always consult a repair manual for your specific model for detailed location and replacement instructions.

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1mo ago

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