Could someone please tell me where exactly Bank 2 Oxygen Sensor 2 is located and what the OEM part number is. As far as i know it is the one after the catalytic converter on the side of the motor facing the radiator fans, but the downstream sensor i ordered from Amazon (compatible with RDX) has a longer cable and a different (male rather than female) connector as well as different looking sensor tip (see pictures, Original OEM sensor is on the right)

 

That's right, a sensor with a long wire is the downstream second sensor, sensors with short wires are the upstream first sensors. You are probably confusing the concept after the catalytic and before the catalytic. The diagram says that there is no second sensor of the Bank 2.

 

I figured out your sensor is down on the pipe, on the transmission side

 

I take it #14 and #18, the upstream sensors are the wideband sensors and #19 and the one in the pipe #11?, the downstream sensors are the narrowband sensors?

What is #1 in the second diagram? Is that an additional cat or a flex pipe. Impossible to tell from the line drawings.

 

Thanks guys, I figured it out: As far as i know there are two catalytic converters and 4 sensors on the RDX, two for each converter. The sensors on bank 2 (where front catalytic converter is) both have short cables. The upstream sensor is accessible from under the hood, at the front of the engine compartment, downstream sensor is on the exhaust pipe right after the cat, and easily accessible by crawling under the car from the front. I needed the downstream one for the second bank but they sent me the downstream sensor for the first bank (#19 on the second diagram). Anyway I returned it and ordered another one but this time i made sure to check the connector and the cable. I received it and installed it yesterday and it seems to have solved my problem. No more P0159 (Sensor Circuit Slow Response Bank 2 Sensor 2). See the photos for sensor location. First one is the upstream sensor, the second one is downstream.


2013 RDX - Bank 2, Upstream Oxygen Sensor

2013 RDX - Bank 2, Downstream Oxygen Sensor

 

Also know that the upstream and downstream O2 sensors cannot be interchanged even if the connector and wire lengths are the same.

 

Most likely due to the fact that they are not interchangeable, this is the reason why Honda makes different lengths and different connectors.

 

I hope you bought a sensor from Denso or at least Bosch.

 

Yes, I know that. That's why they sell them as Upstream and Downstream.

 

I really don't care about the brand as long as it works. Yeah Bosch or Denso will probably last longer but cost 3 times as much. I really don't think i will have to change that sensor 2 more times, so on a 10 year old CUV low cost takes precedence for me. I religiously follow my maintenance schedule and the car was free of mechanical trouble for the last 10 years. This oxygen sensor and one of the liftgate supports are the only components that failed so far.

 

If the OEM quality Denso costs $65 , then with a difference of 3 times it turns out you bought your sensor for $20? I wonder how much it will last for this money.

 

Like I said in my post, even if the connectors and wire lengths were the same, they could not be interchanged if one is a broadband sensor and the other is a narrowband sensor.

 

Like I said in my post, even if the connectors and wire lengths were the same, they could not be interchanged if one is a broadband sensor and the other is a narrowband sensor.

 

https://www.rockauto.com/en/moreinfo...606888&jsn=724 even cheaper on RockAuto.com.
Famous last words You'll be complaining in a few months when your CEL comes on again and/or your fuel economy hits a wall.. but oh well, you saved a few bucks

 

Like I said in my post, in Hondas this does not happen.

 

You missed the point. I know, but the point was those two types of sensors cannot be interchanged and sensors (yes even brand names) can also be bought where they just come with wire ends where the owner splices the old connector in. In that case, you better get the correct sensor type.

 

Especially when a component is harder to get to, like a clutch or dual-mass flywheel, for example. On forums I always laughed when owners get the so-called best oil and then install the cheapest no-name oil filter.

 

You missed the point. The fact is that the author did not even try to swap them, but I don’t know anyone who would think of doing this if the sensors are visually absolutely different.

 

Yes, I know ALL that. What is wrong with learning something instead of being a simple "parts replacer"?

It was a "learning exercise". You average person and a slew of mechanics don't know the difference between a wideband and narrowband O2 sensor and where they are used. That video I included explains that.

 

Do not pay attention to him, he is just another lonely person who wants to tell information that no one needs, and with the idea that he is the smartest, he tries to be clever.

 

Yup, never needed a shop or mechanic. Probably why my cars last so long.

 

I think you are right, the average user does not need to know exactly how this sensor works, for a correct replacement, he just needs to order by part number and compare with the original before installation. Everything is super simple.

 

I also looked at the diagram and realized that only narrowband О2 sensors are used for these engines, which means that all these teachings were made absolutely in vain.

 

Ok, I suppose that $65 is in USD, I pay in CDN so for me that's $88 + shipping + import fees, it is way over $100. I bought mine for $45 CDN and works pretty good so far, no more error codes for P0159. How long will it last? I don't know, it remains to be seen. From the exterior appearance it felt solid and nicely made, but even if it doesn't last for another 65K (the original lasted that much), i will not shed a tear, I can buy another one and replace it quite easily.

 

- No, i won't be complaining because i am aware i didn't buy an OEM part, and no i didn't save a few bucks, I saved more than %50

- I never buy the most expensive gas, oil, transmission fluid, brake pads, brake drums... you name it...., i do my own maintenance and haven't paid a single penny to any dealer/mechanic so far and yet my 10 y/o RDX runs without any problems... So I must be doing something right, what's there to complain 😉

 

Do some more research. Hondas are notoriously finicky with O2 sensors (I found this out the hard way). NGK or Denso, unless you want to do it again in a short period of time. A Bosch sensor went a week for me before throwing a code.

 

Some people like to learn the hard way

 

It's still going fine. Like I said, I don't care if it fails way before the original one. At the price I paid I can easily replace it. You seem to be concerned about my wallet more than I do...LOL

 

If the BOSCH sensor lasted only a week, I'd check for another fault causing the sensor to fail or the ECM throwing a code. Or maybe it was just a dud, BOSCH is a good brand, I owned many of their power tools for decades, none failed so far.

Quote from MotorTrend: "At present, the Robert Bosch Corporation has over 218 million of them on the road in the US market; that's over 92 percent of the cars on the road"

 

Believe me, even if he screwed up, he would still think that he was right, there are people who like to learn from their mistakes instead of learning from others. Just wondering if they are so smart, then why do they ask for help here, and then they begin to claim that they are smarter than others?

 

First off, I haven't screwed up, not yet anyway. I'll see how long this O2 sensor will last and will make a decision at that point. Secondly, I have already purchased the sensor by the time people suggested certain brands, so the arguments are pointless. Besides I never asked for a brand, my question was about the location of the sensor. Learning from others is good so long as the answers have a relevance to the original question, and I appreciate answers that are to the point. Lastly, I never claimed I am smarter then others, but you and others who started to flame me for my choice of the sensor certainly seem to think that you are. So please if you don't have something constructive to say just refrain from saying anything and stop turning this thread into a flame war. Thank you.

 

I answered thoiboi and did not write anything to you, do you know that it is not polite to intervene in someone else's communication?

 

Hmmm, I wonder who you were refering to when you said: "Believe me, even if he screwed up, he would still think that he was right". Besides If there's any interference it is by you, interfering in my communication with toiboi, but thank you for teaching me how to be polite...LOL.

FYI, I haven't screwed up as the sensor still works just fine after two months. I remember thoiboi telling me that "I'd come here and complain in a few months" because i bought a no name O2 sensor. I Wonder how many months is "a few months", really?