Help! O2 sensor location - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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post #1 of 5 (permalink) Old 06-16-2019, 12:43 PM Thread Starter
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Help! O2 sensor location

So I have a 2003 mazda 6s 3.0L v6 and I need to know which sensor is bank 2 sensor 2 in the o2 sensors along the exhaust and which side of the motor it’s on I’m new to this but I need to fix that cause it’s throwing a check engine light.
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post #2 of 5 (permalink) Old 06-16-2019, 01:11 PM
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Cylinders 1, 2 and 3 are the ones close to the firewall therefore those are bank 1. Bank 2 is the one close to the rad, sensor 1 is before the precats located close to the manifold, sensor 2 is past the precats, you'll have to get under the vehicle to see it.

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Last edited by jman1200; 06-16-2019 at 09:03 PM.
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post #3 of 5 (permalink) Old 06-16-2019, 01:20 PM Thread Starter
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Originally Posted by jman1200 View Post
Cylinders 1, 2 and 3 are the ones close to the firewall therefore those are bank 1. Bank 2 is the one close to the rad, sensor 1 if before the precats located close to the manifold, sensor 2 is past the precats, you'll have to get under the vehicle to see it.

Okay I’ll take a look thanks for the help is there only one sensor down there? I’ve been told there are only 3 sensors in total but I wanna make sure before I mess anything up.
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post #4 of 5 (permalink) Old 06-16-2019, 08:22 PM
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Quote:
Originally Posted by White knight6 View Post
So I have a 2003 mazda 6s 3.0L v6 and I need to know which sensor is bank 2 sensor 2 in the o2 sensors along the exhaust and which side of the motor itís on Iím new to this but I need to fix that cause itís throwing a check engine light.

@jman1200 has got it.
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post #5 of 5 (permalink) Old 06-20-2019, 02:09 PM
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I am curious what code is it showing. Depending on what the code is it may be the Intake Plenum Gasket or Mass Air Flow sensor.
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