3warnes

I know this is a popular topic but I just wnat some clarification on it. I currenty have two codes P1133 and P1135, could you please tell me exactly where they are located and what tools are needed? If you have a part number, that would be nice. I am told that I do not want to confuse this with a o2 sensor. I imagine Denso is the suggested brand, correct?

thank you

Lexmex

It could be this sensor behind the engine (most likely) known as Bank 1 sensor 1.

3warnes

Do you know if it is part #C5015-137304? Does $197.00 US sound correct?

thanks

Lexmex

Or it could be this front sensor known as Bank 2 Sensor 1.

Usually, the OBDII scanner will tell you which sensor it is.

Lexmex

I am not sure about the part number, but at oxygensensors.com where many of the CL members of have gotten theirs it is the one before the catalyst and it is $170.98.

3warnes

Isnt the o2 sensor and the air/fuel ratio sensor two different things?

Lexmex

Well, it is the subject of some dispute here, because on different vehicles it can mean the same or different things.

For the RX300, the O2 sensor is the one after the main cat below the vehicle. The A/F or air/fuel sensors are before the main cat. The pictures of the ones above are of A/F sensors.

3warnes

If my code says bank1 sensor 1, then it is a A/F sensor correct? Sorry for all the questions but I ma trying to clear this up so I can order it today.

Lexmex

Yes. That would be the one I showed in the first picture on this thread.

BTW, if any of you get one that says Bank 1, Sensor 2 that refers to the one after the catalytic converter after the main cat below the car.

3warnes

Are all the A/F sensors the same (either bank)?

Lexmex

Yes.

Only the O2 sensor after the main cat is different.

3warnes

Any specific tools needed?

Lexmex

I will have to defer on this one to some of the other members who have done this specific to the RX300, though it has been talked about in this forum before.

Definitely a DIY project though and not too hard...as I have done it on other vehicles with my uncle.

3warnes

Would a Bosch A/F sensor be sufficient instead of Denso?

Lexmex

I would stick with the Denso.