Thank you for clicking the thread!!

Want to replace the O2 sensor since got the code P0134 and P2251, having a hard time in locating this baby.

My car is a 2005 accord ex-l coupe, V6 3.0L. So the question is the bank 1 sensor 1 should be upstream front or rear???

I found two O2 sensor under the hood, please help me to identify if either of these sensors are Bank 1 sensor 1.

Thank you so much！！


closer view of 1



closer view of 2

 

please help!

 

closest to the firewall is you bank 1 sensor 1, and they are A/F ratio sensors (air fuel ratio) the sensors after the cats are O2 sensors.

 

See post #5 in this thread:

https://www.hondaaccordforum.com/for...-sensor-45540/


Looking from the front of the car Bank 1 is the REAR (firewall). Bank 1, sensor 1.

 

Thank you, so it's more like the #2 (the above one) in my first pic?

 

Yes, exactly.

 

Hello, im having the same issue with the same car/specs. I had code that showed bank 2 sensor 2. So when talking to multiple ppl they informed me by viewing the first pic above that its the one that's circled at the top. But when I installed it im still getting the same code.

Ok, I know some ppl would say faulty sensor but I don't think that's the case. I even had someone tell me to switch out sensor 2 from bank 1 to see if thats the problem.

Also with this car which I thought was odd but I know every car is different is that this o2 sensor was found in the front of the car like bank 1 and not towards the center.

When the o2 sensor was installed is it possible that I switched out the wrong o2 sensor because I don't know how many catalytic converters this car has.
Please help!!

 

Please post the actual code number.

But if it's really bank-2 sensor-2, then it would be down underneath. The sensors you can see from the top are sensor-1 for each bank.