Closed loop, Bank 1
Closed loop, Bank 2

these are the codes i got when i went to autozone, anyone ever had this prob before???

 

Those aren't codes, those are short descriptions. If you would give us the actual codes (P0042, P1042, Pxxxx) then we can look it up and give you the Nissan description.

 

well thats what nissan gives as a description

 

i just cant remmeber the codes, lol

 

Believe me, there's a lot more than that in the FSM. Autozone usually gives you a printout with all kinds of details.

Working backwards, I found your code(s), but they are generic. According to the FSM, they accompany other codes that are the actual problem with the O2 sensor.

 

P0150 Closed Loop, Bank 2 Or Front O2S, Bank 2

 

^^^ No need to post the codes here, there's already a sticky with them:

https://my350z.com/forum/engine-and-drivetrain/217263-ecu-error-codes-very-helpful.html

Plus there are many other sources on the net that a Google will return. The short description doesn't really help, it's the details that matters.

 

how would i single out which O2 sensor is bad? I dont want to change them all out, lol. O2 Sensors are expensive nowadays