# Chevy blazer

**URL:** <https://community.cartalk.com/t/chevy-blazer/38708>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, blazer\
**Created:** [October 28, 2009, 12:47am UTC](https://community.cartalk.com/t/chevy-blazer/38708 "2009-10-28T00:47:38Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![mustang97](https://avatars.discourse-cdn.com/v4/letter/m/67e7ee/32.png) [@mustang97](https://community.cartalk.com/u/mustang97)\
**Post date:** [October 28, 2009, 12:47am UTC](https://community.cartalk.com/t/chevy-blazer/38708/1 "2009-10-28T00:47:38Z")

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looking for bank 1 sensor 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 28, 2009, 12:52am UTC](https://community.cartalk.com/t/chevy-blazer/38708/2 "2009-10-28T00:52:00Z")

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Bank 1 is the side of the engine that cylinder #1 is located. Sensor #2 is the O2 sensor after the catalytic converter on that side of the engine.

Tester

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**Author:** ![mustang97](https://avatars.discourse-cdn.com/v4/letter/m/67e7ee/32.png) [@mustang97](https://community.cartalk.com/u/mustang97)\
**Post date:** [October 28, 2009, 1:05am UTC](https://community.cartalk.com/t/chevy-blazer/38708/3 "2009-10-28T01:05:18Z")

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ok there are four o2 sesors on there one on each side of the y pipe and one before the cat and after so u say it will be after the cat

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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 28, 2009, 1:09am UTC](https://community.cartalk.com/t/chevy-blazer/38708/4 "2009-10-28T01:09:51Z")

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Yes. The O2 sensor before the cat is sensor #1. The sensor after the cat is sensor #2.

Tester