Thread: O2 Sensor Questions
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Old Jul 31, 2016 | 08:55 PM
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pizzaguy
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From: Fort Worth, Texas
Default Re: O2 Sensor Questions
Stop wasting your time at Autozone.
Maybe this will help:

http://www.autohausaz.com/search/pro...xygen%20Sensor

"Upstream" and "Downstream" are stupid designations, if you ask me, but no one has asked me. IT is my understanding that the "upstreams" are the ones in the engine compartment, that is, before the CATS and "downstream" refers to the post-cat sensors under the car.
 
Last edited by pizzaguy; Jul 31, 2016 at 08:59 PM.
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