So about two weeks ago I fill her up with 93 Octane, and then notice it's with 10% Ethanol. So I am like ok. Well now I am down to about a ¼ tank and have started throwing this P2A03 “O2 Sensor Circuit Range/Performance, Bank 2 Sensor 1” code.
Some background on my ride.
.Nismo Cat Back
.K&N Seris 63 intake
.MotorDyne 5/16 ISO Spacer & Mrev 2
.Berk Highflow Cats
.UPREV Osiris Tuned "Running the 93 Tuned Map"

Now I have search the forms and read quite a few about the P2A03 Code. Some related to HFC’s and exhaust leaks.
So my questions are:
1. Could the 10% Ethanol be causing this?
2. Where is Bank 2 Sensor 1? I am guessing Passenger side and the Sensor on the header before the HFC.

Now I am about to take drive for dinner. So I am going to log some data so I can check the AFR’s just to make sure there good.

Edit:
AFR's under normal Driving:"Avg" RPM 2125, B1=14.65, B2=13.59
AFR's under hard Driving:"Avg" B1=13.69, B2=13.77

Edit II.

Just found this thread. So Never mind
https://my350z.com/forum/engine-and-...-fix-read.html


Thanks for the Help,

C

 

wow..i must be running really rich on my maxima lol.....hitting high 12's @ wot =] car was throwing out flames sat night on the LIE lol