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I got the engine code P0131 on my 2000 Buick Century, where is HO2S location?

Vehicle: 2000 Buick Century

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Hi there,

The code is specific to the first O2 sensor in the system. This is the one before the catalytic converter.
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P0131 BUICK Code - HO2S Circuit Low Voltage Bank 1 Sensor 1
Read more: https://www.autocodes.com/p0131_buick.html

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