Hey guys, my car (2013 G37 coupe) threw a P2096 SES code and I'm not sure what to replace/fix to solve the issue, seems like it could be the passenger pre-cat 02 sensor from my research.

I'm running a Stillen CAI, Fast Intentions HFCs, and Ecutek tune which I've had on the car for about 30k miles with no issues till now. I've attached a screen shot from the torque pro app as well. I appreciate any help, thanks.

 

Make sure no leaks. Clean maf sensors. Do seafoam via vacuum line off master cylinder. Clear code see if it comes back

 

Thanks for the help, will do that. For the seafoam cleaning, that's the vacuum line near the brake fluid reservoir, right?

 

That would likely be the brake booster line, can do it there but braking will be firm (Assuming it's actually the booster line)

 

Will hold off with seafoam for now. It was most likely a leak, the passenger side post-cat o2 sensor was unscrewed a bit so I tightened that and everything else, cleaned the MAF, and cleared the code. Will see if that does it. Thanks again for the help guys

 

I suspect the issue is the high flow cats oxygen storage capacity has decreased below the ECUs threshold.
This is detected by the post-cat (sensor 2) O2 sensor.

To check, here is a video (using a G37) on how the rear o2 sensor voltage should change during different driving conditions:

Understanding & Live Graphing of the Rear O2 Sensor: OBD4Everyone Ep.19

Since you have EcuTek, why not just turn off the code(s)?

 

Yup feed in SeaFoam through brake booster line. However, technically it's recommended you change out your spark plugs as well. That's what I did. Before I do an oil change I'll run some SeaFoam through the crankcase.

Any updates?

 

I sea foamed by shoving the tube into the bottle. I did this twice to changing plugs at 80l. They were light brown.