I threw a p0420 code after tp install, the code is "Catalyst System Efficiency Below Threshold" I have non-foulers, I think bank 2 is working properly but bank 1 is throwing a code. Which side is it does anyone know?

 

ttt

 

i think bank one is upper portion of the exhaust sytems and bank two is the lower version of the exhaust. Not sure if each side has their own number.

 

I started to search for the answer to which is side is bank 1, and came across this. This is just too funny to pass up!

https://my350z.com/forum/the-lounge-off-topic/183662-answers-to-all-of-your-questions.html

 

Not sure if this is gonna help, but when my o2 sensor on bank 2 was damaged, it was the driver side header o2 sensor

 

Hmmm I'm thinking bank 1 is the sensors on the cats and bank 2 is the sensors on the headers. Thanks for your input.

 

If it goes anything like pistons, bank 1 would be passenger side

 

According to the FSM, Section EC, Page EC-109, All Bank 1 engine components are on the passenger side.

Added image:

 

^Oh nice, thanks for that brotha~!

 

this should be in the top 100 questions thread, this does come up from time to time. (adding it now)

 

BTW, I saw a tip on here a couple of years ago on how to get a legal copy of the FSM, from Nissan, for $20. I wonder if that method still works. You have to click about 200 times, but in retrospect, WELL WORTH IT. I could probably find it if there's enough interest.

 

I found one for free on google a long *** time ago, too big to send to anyone though.

 

Looks like it still works. For $19.99 you get a 24hr subscription to access all Nissan downloadable material, including the service and owner's manuals. I spent about 3 hours, and wore out my wrist, but I got it.
http://www.nissan-techinfo.com/nissa...line1&mscssid=

 

Wow that sounds like a good deal?

 

I found one for free with Google. 65Mb with .7z compression.

 

I think someone has posted the FSM for all the years, at least it is there on g35driver... I got my FSM off ebay on a CD for $20 shipped.

As above image indicates (very nicely I might add):

Bank 1 = Passenger side.
Bank 2 = Driver side.

- on the USA VQ platform.

bank designation has nothing to do with the pre-cat vs post-cat O2 sensor position.

 

Interestingly my friend with a Lexus GS 300 got a CEL for his heater circuit on the O2 sensor on bank 1.

I assume bank 1 would be the same on a lexus?

 

The even and odd number banks I think are a universal concept on cars... I know the Z and Mustangs definitely follow that approach anyway...

Also, if i remember correctly this link has free downloads of the Z service manuals or some sort of manuals anyway... too lazy to unzip them and see what they are.
http://www.vq35de.com/ESM/Nissan/350Z/

 

I believe Ford has it reversed? Not 100% sure, but I read that somewhere... It is also unclear to me if the designation changes between LHD and RHD vehicles.

 

What does Ford and RHD vehicles have to do with this question? I personally couldn't care less, but if I HAD to know, it would take a few minutes of SEARCHING one of those forums for the answer.