Hey yall! thanks again for your support in past posts. My vehicle is a 2003 lexus gs 300 and i recently had come into problems that i believe to be an o2 sensor thats gone bad. I smell the lean/rich mixture after driving and was wanting to know which o2 sensor i should purchase to remedy this issue. Would this suffice for codes:

Error codes:
1. P0153
2. P0133
3. P0057

O2 sensor:
https://www.1aauto.com/Toyota-Lexus-...r/I/1AEOS00191


Thanks again!

 

also note: MAF sensor was replaced rather recently with a quality part so ive ruled that out as well.

 

A MAF wouldn't have anything to do with those codes. Buy a Denso sensor.

 

So i ended up buying both upstream sensors (bank1 sensor 1 / bank 2 sensor2) and that seemed to help with the issue as the codes werent coming on as quickly any more and finally replaced the bank2 sensor 2 and that resolved my error codes. Drove 2 days and have not had issues recur yet although i do smell a bit of the rich/lean mixture still. Wondering if thats the oil leak or the fuel/air still, im going to replace the cam seal soon and then start taking a look around.

Summary:
Upstream sensors replaced - seemed to help a little but p0057 code still remained and then other codes returned days after replacement
Downstream bank 2 sensor replaced and resolved error codes.