rosen71

I got these.


The CEL and VSC were gone immediately.
I couldn't find a better price.
In my local Lexus dealer, I was asked for 380$ a piece.

maorsela

Hi everyone,

I have a P1155 on my 2002 FWD, which sensor is it? very confused, read too much conflicting information.

Is it the one in the front by the radiator that LexMex shows in his 1st pic on page 1? Is the replacement part for it 234-9009?

Thanks!

rosen71

The part No is correct.
B2 S1.
In general, it is recommended to change them both at the same time.
I don't think that 200$ is too much.
Even that I am from Bulgaria, I ordered mine from USA and together with the PB blaster and sensor wrench, plus postage, cost me 240$.
Otherwise you will run these $$$ through the exhaust pipe

artbuc

No, it is not generally recommended to change both except by stealerships and dishonest indies. One can outlast the other by 40-50k miles.

rosen71

I mean that for extra 100$ it's not worth the hassle to do it again. Anyway, it is a Lexus, not some cheap crap car.

artbuc

You are not doing it again as there is no overlap in labor. Also, just because it is a Lexus (and I have owned two of them) does not mean it is smart to replace perfectly good parts. If you needed front brakes would you also replace the rears just because it is a Lexus?

jazz7452

CEL, VSC, Trac on. Code 1135. I replaced the MAF and A/F sensors, but the lights are still on. I informed the mechanic. He stated that I should drive the car 200 miles to clear computer...if the lights come back on bring the car back. This is such a major headache as I've not had any problems out of my 02 RX300. It still drives very good!! I keep the oil changed on schedule. I've wasted $$$.
Can someone please tell me if driving the car 200 miles will fix the problem? Or, what could be the issue? I'm unable to get an inspection...

many thanks!

rosen71

Did you get the codes cleared? P1135 is A/F sensor.
If not, disconnect the battery for 10 min., and reconnect it.
The lights should be gone. Drive the car and check again. P1135 is a heater circuit of the A/F sensor, and the light should come on at once if the circuit is not OK.

artbuc

If you had a spurious code, it will clear after a predetermined number of drive cycles which may or may not correspond to 200 miles depending on the nature of the miles driven. You can check the heater circuit with an VOM (two black wires). Hardest part of replacing B1S1 is separating the electrical connector. Once you have 100% confirmed it is bad, just cut the wires at the connector which will do two things for you. You can pull up the wiring to undo the electrical connector and you can use a regular 22mm 6 point deep socket to remove the old sensor. Unless you have a very high quality O2 sensor removal tool, the slotted O2 sockets tend to flex which could lead to rounding off the old sensor making it very difficult to remove.

chenxingha

Thanks Lexmex. Just got Check Engine light and the code is P0136 (for bank 1 sensor 2) from an ODBII reader. Need to confirm that Denso 234-4215 Oxygen Sensor is the right part number before ordering.

Amazon priced it at $53.78: