Thnaks to all for the great info....I just replaced my front sensor...Used PB blaster and a box 7/8 offset wrench...took a little work by moving back and forth but it finally gave way...

A small tip: There is a cluster of wires wrapped in an insulating rubber guard above the sensor plug..If one moves this out of the way by removing a small clip then the snesor is easily unplugged

 

Thanks for this thread-just did the sensor behind the radiator...used PB blaster, let it sit over night. Popped right off with a small vice grip, wasn't much effort needed. The connector was another story...would NOT budge. After 15 mins, my wife casually mentions to take out the battery for a better angle.

Pulled battery, connector came right off, and reinstalled new sensor. Total job took 20 mins.

 

Greetings,
It is appropriate to get in touch by phone or email? I live in OC and need some help with Bank 1 Sensor 1 on my Lexus RX300. I'm new to this or any kind of forum. I noticed that you said you might be able to help the guy from San Diego free up his A/F sensor. I would most appreciate some help!

Warm regards,
Adam

 

CL provides private mail (pm) option to all its subscribers to communicate person to person. Just be aware that what you post in forum is visible to all.

Please use common sense and good judgement in dealing/interacting with strangers. Read the rules and guidelines.


With that out of the way, the process is very simple with the right tool and patience. There is enough information in this thread.


Salim

 

I recently had my rear sensor (bank 1, sensor 1) replaced by a local mechanic while he changed the oil (I had ordered the sensor online). Charged me a few extra $ but I didn't have ramps or ability to jack the car high enough to work underneath. Best part - I was in/out in half an hour.

 

Just ordered the Denso from Amazon last night--less than $78.00, including shipping! Plan on doing it as soon as I get it.
Thanks for the great writeup!

 

We had quite a few horror stories about the sensor stuck solid and now we are hearing about a change as easy as an oil-change. I think the issue gets sensationalized by complaints only.

Salim

 

+1. I did two Bank 1 A/F sensors both at about 80k and both popped right out.

 

I've only changed one A/F sensor the one near the radiator and it came off with ease.

 

That's a great price, about 30 bucks less than what I paid. Nice!

 

After a couple hours in google and phone calls to autozone, advance auto, and two lexus dealers parts department I get a lot of conflicting answers for the P1155 code. The leading candidate is the very front sensor by the radiator. Can somebody confirm?

I have VSC and CEL illuminated. Tried zero point calibration and other common remedies.

 

Yep, you got it right. Only use OE Denso to replace: http://www.amazon.com/Denso-234-9009...=5336108637-20

 

Darn, that was fast. Thanks Carguy07. Off to Amazon.

 

Used the denso 234-9009 to alleviate my P1155 error.

Originally, As mentioned in previous post I only had the VSC and CEL illuminated
I only had a P1155 code
Zero point calibration did make error lights go off but as soon as i put car in gear the error lights and P1155 returned , therefore bought a new sensor

Used short stubby sensor removal tool from ADvance auto ($12)
sprayed wd40 on joint a half dozen times over a couple days
Removed battery for easier access to connector
had to use a short breaker bar on socket wrench to break free and unscrew sensor

Thanks again carguy07

 

I had a CEL code of P1130 a couple of weeks ago. I ordered a couple of Denso 234-9009 A/F sensors to change out both Bank 1 and Bank 2. I did the Bank 1 Sensor 1 last weekend and it was a breeze. Just tight space to work in under the RX300 (2001). I'll change out the Bank 2 sensor in the front when the part comes in. I plan to change out the Oxygen sensor too, I think it's called Bank 1, Sensor 2, just after the Cat. Converter. I'm changing them all out since the RX has 205k miles and only had the A/F for B1-S1 changed out at 108k, a few years back.
I have noticed recently that the exhaust smells strong. I hope it not the Cat. Converter. I'm hoping the O2 sensor change will help with that one. I cleared the code but it came on the next day for just that one day. It has not reappeared. I'll repost when I find out what the new code turns out to be.