Hi,

I have Emission DTC codes on my 2003 Honda Accord Couple 3.0L V6.
Here are the codes: P0154, P02254 and P2631. I have been lead to believe that they are all related A/F Bank2 Sensor 1 (Bank 2 upstream O2 sensor) . Here is my question:

Where is bank 2 on my 2003 accord? It is right behind the radiator or right before the firewall?

I know Bank 1 contains Cylinder 1 is this how the cylinders are laid out?


-------
firewall
------
1 3 5
2 4 5
-------
Radiator
-------
Front of car

Thank you in advance.

 

I would think that cyl 1 would be on the front of the engine, therefore bank two would be near the firewall. This is based on my experience with other transversely mounted v6's.

I have done no research nor claim knowledge on the 03' v6

 

Looking from the front of the car, Bank 2, Sensor 1 is the A/F ratio sensor in FRONT (radiator side).

See this thread, my post #6 and #12:

https://www.hondaaccordforum.com/for...problem-47896/

 

---------
firewall
---------
123
--------
456
--------
radiator

 

Gents, I appreciate your assistance. I went to AutoZone and purchase a BOSCH upstream sensor for $90.00. It has all the correct sensors connectors. I am wondering of I should purchase a more expensive o2 sensor. Some run at $170+. I am reading that some of the aftermarket stuff can change the way the car drives. What are you experiences with aftermarket o2 sensors? I am hearing alot about Denzos.