Which 02 sensor
 

Hey guy,

My wife's car has a CEL. I used my obd2 reader and got a P2A00 error code which is an 02 sensor. I just want to see if anyone knows if that is the one that is right below the exhaust manifold or if it's the one by the catalytic converter. Also, has anyone used and had success with the $15 eBay 02 sensors? I just want to be sure I am buying the right thing before I spend the $$, as I'm finding most places are not taking electronics pieces back for return.

Thanks and God Bless,
Ross

It's the UPSTREAM sensor (the first one that the exhaust encounters).

With Hondas, its always best to avoid the cheap sensors and stick with Denso. BUT, you gotta be aware that some Amazon sellers substitute cheap ones.

In any case, be prepared to spend over $100 USD.

https://www.fitfreak.net/forums/1st-...-f-sensor.html

Hey thanks for the insight. I was kind of planning on getting the denso, but was curious.