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What is the exact part I should ask for? I've been told by 2 different auto zone workers different parts. Mass Air Flow Sensor or O2 Sensor but they didn't know if it's downstream or upstream.

Vehicle: 2008, Toyota Camry, 4-cylinder

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HI there,

This code is for the bank 1 sensor 1 O2 sensor. This is the sensor BEFORE the converter or the UPSTREAM sensor.

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