swat1727

iTrader: (2)

i checked the code "P0141 Heated Oxygen Sensor Circuit - Bank 1 Sensor 2." what is that? i think it's the o2 sensor, does anyone know which sensor it is? and part #? thanks

jcat_350

in terms of the exhaust system being the stream, you have 2 banks in the stream.

engine being the top of the stream, first bank has 2 or 3 sensors i believe, the second one going toward the back of the vehicle is the one. Odds are, this sensor has gone bad. Just search around, i believe this problem has been covered before, you should be able to get a part number.

swat1727

iTrader: (2)

http://cgi.ebay.com/ebaymotors/ws/eB...m=250299755089

is this what i need?

LEXUS GS300 (2001) 3.0L L6 FRONT; LOWER; AT CYL 1-3 2JZGE

jcat_350

no, you would need part no. (denso) 234-4048


this is the part number for the sensor in the pre-cat bank that handles cylinders 4-6.

here is how your sensors go, as i clarified it for myself just now:

Bank 1: before the cat. Sensor 1 handles cyl.1-3, Sensor 2 handles cyl.4-6

Bank 2: after the cat. Sensor 1 again handles 1-3, Sensor 2 handles 4-6.


if youd like, oxygensensors.com has the denso part for 120, which is a very reasonable price:

http://oxygensensors.com/catalog.php...3835#Location1

swat1727

iTrader: (2)

i found this online, he is saying bank 1 sensor 2 is the one after cat but still cyl. 123. i am confused =/ what exactly is bank 1 sensor 2?

(1,2,3 precat) Bank 1 Sensor 1: 234-4048

(1,2,3 postcat) Bank 1 Sensor 2: 234-4626

(4,5,6 precat) Bank 2 Sensor 1: 234-4630

(4,5,6 postcat) Bank 2 Sensor 2: 234-4603


https://www.clublexus.com/forums/sho...ighlight=p0141

jcat_350

no, you're right, that's my mistake. I'm thinking banks in terms of upstream and downstream, it's actually just as you diagrammed it, in terms of cylinder banks.

bank 1 is cyl 1-3 and bank 2 is cyl 4-6, sensor 1 is precat, sensor 2 is post cat. 234-4626 is the one you need.

my bad damn sleep deprevation

swat1727

iTrader: (2)

haha cool thanks man for all your help!

dustinnjit

Swat, were you able to clear out the code by order denso 4626? I got the exact same problem. Thx.

DASHOCKER

iTrader: (2)

I had to replace an o2 sensor TODAY on my 2002 Rav4 which only has 35k on the clock

$250 bucks including labor. O2 sensors are not covered under the Toyota/Lexus 8/80k emissions warranty..The dealer also reflashed the ECU as a result of a TSB to re-calibrate the air fuel mixture which was too rich.

mrploww

I too have the same CEL code. I replaced the correct sensor, disconnected battery and the CEL came back on within a few miles. I have been driving it for a couple weeks with the CEL on and for some odd reason it went off last night, then back on today with same code. I have an appointment with Toyota to try and figure it out.

Any suggestions for me to try on my own?

Thanks!