Oxygen sensor bank 2 sensor 1

1999 TOYOTA SIENNA
123,000 MILES • 6 CYL • 2WD • AUTOMATIC
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FIXSKY
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i check the trouble code for my sienna and its calling for o2 sensor malfunction its say bank 2 sensor 1

my question the location of this sensor is the one by the firewall or the one on the radiator side i want to know so i can get the right sensor

thanks for the help
Nov 23, 2008 at 5:18 PM
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RASMATAZ
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Hello,

Here is a guide to help you see what you are in for when changing the oxygen sensor

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Check out the diagrams (Below)

Please let us know if you need anything else to get the problem fixed.

Cheers
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Nov 23, 2008 at 6:13 PM
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PLVINAL
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I had an error code that indicated bank 1 sensor 1 A/F sensor was bad. I have purchased a new sensor, but not sure form the Chilton Diagram where this particular sensor is located. Could you help with giving a way to locate? I found 2 different sensors but the one under the car sounds like it might be the O2 sensor, whereas the one under the hood has a different connector.
Apr 13, 2018 at 12:06 PM (Merged)
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RASMATAZ
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Bank 1 Sensor 1

Bank 1 is usually the front bank of cylinders on a transverse mounted V6 engine.

The one on the exhaust is the heater oxygen sensor could be 3/4 wires.
Apr 13, 2018 at 12:06 PM (Merged)
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CANDYMANMS
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on exhaust next to the firewall
Apr 13, 2018 at 12:06 PM (Merged)
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CEWA
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how can i locate and remove bank 1 sensor 2 02 sensor on my 2006 sienna xle
Apr 13, 2018 at 12:06 PM (Merged)
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WRENCHTECH
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It's the one located after the converter on the rear bank. It just unplugs and then threads out.
Apr 13, 2018 at 12:07 PM (Merged)