BellWitch

I know bank 2 sensor 2 is after the cat but I'm not sure if it is on the driver or passenger side. The brand I've seen recommended to replace it with is Denso. Problem is 1) as stated I'm not sure what side and even if I did 2) rock auto shows the Denso sensors as downstream left or right instead of the bank and sensor number. I'm not sure if left is supposed to be driver and right is passenger. Any help would be appreciated. The only answer I've seen is from a short youtube video saying bank 2 sensor 2 is on the driver side but I'd really like to confirm this with another source. Thanks.

Clutchless

This has been asked, answered, and discussed many times.
I will help you help yourself by providing a link to search results regarding oxygen sensors. Your assignment is to read the linked threads to find the info you need.
A drawing of their locations etc is in one or more of the threads.
Good Luck.

​​​​​​https://www.clublexus.com/forums/sea...rchid=25036858

afpj

Not too sure why clutchless, but that link doesn't go anywhere.

Clutchless

Do a search using the term "Oxygen sensor" in quotes so you search the phrase. Those search results were supposed to be in the link.
You could also try "02 Sensor"
You could also try searching the error codes individually

BellWitch

Thanks. Its a little difficult to sift through the threads to find an exact answer but I did find a tip to run some techron in the tank which may clean up enough gunk to stop the CEL. Thankfully the code is off for now but I'll be still looking into it in case more action is needed. I suppose I'll document my findings here if that's the case.

salimshah

There is no reason why Lexus would switch, but for sure in first Gen RX ,,, the engine is mounted transverse with bank1 near the firewall and bank2 near the front. Cylinder 1-3-5 are near the firewall and 2-4-6 near the radiator. For post combustion, follow the exhaust plumbing.

Salim

BellWitch

I ordered a denso downstream left sensor which I figured must be the b2s2 sensor. Will report back next week after I install it.

salimshah

Argh! Left and right are very confusing terms. They make more sense in a front to back engine. With transverse mount engine, due to rotation it gets confusing [Well if you have the right (proper) perspective it should not matter].

Saliim

BellWitch

Update. Put the part in yesterday. If I'm correct the b2s2 location is near the exhaust pipe between the front wheels. Laughably I'm still unsure if it's fixed now because my obd2 reader decided now is the time to quit. I literally cleared my code a couple weeks ago and now will have to wait until I can get the keys from my wife to take it to an auto store for them to clear it for me. I'd rather do that then disconnect the battery. Will follow up after the codes are cleared.

iolmaster

iTrader: (1)

The codes will clear themselves after a certain number of starts. I can't remember how many. I think it is between 3 and 5. I have done this myself to clear codes and it works.

BellWitch

Just checked it and the code cleared! Thanks everyone!