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The Northstar engine uses two O2 sensors. Sensor 1 is located on a bung in the exhaust after the manifold, but before the catalytic convertor. Sensor 2 is located after the catalytic convertor. It's that simple.

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โˆ™ 2005-01-28 16:58:10
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Q: Where is the Bank 1 Sensor 1 O2 sensor on 1996 Caddy Sedan Deville small Northstar engine?
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