O2 Sensor Error Code P0155

[martian71]

Hi I have an error code of P0155 showing on my 2002 IS300 i know it is for O2 sensor bank 2 sensor 1, what i am struggling to find out is the correct part number. I have contacted 2 different lexus dealerships and got 2 different answers, could someone please help me with the correct part number.

Thanks

[ChrisIS200SportTTE]

Surely just telling them you need B2S1 for an IS300 should be enough?

Can't help you with part numbers sorry.

When I needed B2S2 I found that even the dealers got confused what sensor it is and I had to tell lexus that I needed the sensor past the CAT on drivers side!

[ChrisIS200SportTTE]

P.S. Yours is the sensor on the manifold before the CAT on Bank 2

[Koko]

Hi,

Not sure which one I changed (B2S1 or B1S2) as it was years back but if you planning to diy and dont use car every day just take it out and you can get the part number from the sensor itself.

Good luck!

[ChrisIS200SportTTE]

Hi,

Not sure which one I changed (B2S1 or B1S2) as it was years back but if you planning to diy and dont use car every day just take it out and you can get the part number from the sensor itself.

Good luck!

If you changed it, surely you must remember if it was a sensor on the manifold or on the exhaust pipe after the CAT. If on the manifold then that's b2s1, under the car on the pipe past the CAT then it would've been b1s2

[ChrisIS200SportTTE]

This helped me a lot on my 300. Very good photo showing where all the sensors are on the 300

http://my.is/forums/f115/oxygen-sensors-faq-334479/

[martian71]

Hi,

Not sure which one I changed (B2S1 or B1S2) as it was years back but if you planning to diy and dont use car every day just take it out and you can get the part number from the sensor itself.

Good luck!

Thats another part number to add to the collection, its different to both that i have got so far from Lexus

[martian71]

This helped me a lot on my 300. Very good photo showing where all the sensors are on the 300

http://my.is/forums/f115/oxygen-sensors-faq-334479/

Thanks this is helpful with the location but the post show 3 different part numbers for B2S1

Think i will wait until the weekend and take the old one out and try and get a part number from it.