I have been looking up the old posts about this, but still unclear as to the exact part needed. I believe the part needed for this code (P0141 Bank1 Sensor2 failure) is Denso 234-4626. When I started looking online at Autozone, Amazon, Oygensensors.com, I got conflicting info on if this is pre or post cat. Anyone know if this is the part I need to clear this code?

 

That would be the post oxygen sensor

 

What he said ^^^

 

So from this pic (from a diy on this site), Will the Denso 234-4626 replace the sensor circled in yellow in the picture?

Thanks

 

i had the same code bought that seneor from looking at this and code cleared

 

Thanks man, waiting for the sensor to come in and will install. Will report results. You know I did put a can of BG44k and then got this code. Do you think it is possible that BG44k caused this sensor to fail?

 

I installed the sensor! Wow, feels great saving $300 from the toyota dealer! the only trouble I had was the sensor was really screwed in there, wd-40 helped loosen her up. Replacement was a breeze. Thanks for all the tips.