# P0037 on My '06 Highlander

**URL:** <https://community.cartalk.com/t/p0037-on-my-06-highlander/170963>\
**Category:** Maintenance/Repairs\
**Tags:** toyota, highlander\
**Created:** [October 8, 2020, 2:45am UTC](https://community.cartalk.com/t/p0037-on-my-06-highlander/170963 "2020-10-08T02:45:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jrbirdman07\_166596](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/jrbirdman07_166596/32/23676_2.png) [@jrbirdman07\_166596](https://community.cartalk.com/u/jrbirdman07_166596)\
**Post date:** [October 8, 2020, 2:45am UTC](https://community.cartalk.com/t/p0037-on-my-06-highlander/170963/1 "2020-10-08T02:45:47Z")

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I have my 2006 Highlander with a v6, and the other day it gave me a P0037 code which is for an O2 sensor in bank 1 sensor 2. I went on Rock Auto, but there seems to be a differenet sensor for different positions, so my question is where is Bank 1 and where is the second sensor on bank 2?

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [October 8, 2020, 2:50am UTC](https://community.cartalk.com/t/p0037-on-my-06-highlander/170963/2 "2020-10-08T02:50:17Z")

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Bank 1 sensor 2 is the O2 sensor after the catalytic converter.

Tester

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**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\
**Post date:** [October 8, 2020, 6:01am UTC](https://community.cartalk.com/t/p0037-on-my-06-highlander/170963/3 "2020-10-08T06:01:35Z")

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> [@jrbirdman07\_166596](#):
>
> my question is where is Bank 1

Bank 1 is the rear bank, firewall side of the engine.