Oxygen sensor bank 2 sensor 1

FIXSKY

MEMBER
1999 TOYOTA SIENNA
6 CYL
2WD
AUTOMATIC
123,000 MILES

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

6 Replies

RASMATAZ

MECHANIC
75,992 POSTS

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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Sunday, November 23rd, 2008 AT 6:13 PM

PLVINAL

MEMBER
1 POST
1999 TOYOTA SIENNA
6 CYL
2WD
AUTOMATIC
89,000 MILES

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.

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Friday, April 13th, 2018 AT 12:06 PM (Merged)

RASMATAZ

MECHANIC
75,992 POSTS

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.

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Friday, April 13th, 2018 AT 12:06 PM (Merged)

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