Hello, looking for a little help, my cars a 2010 g37x coupe with 121,000 miles, got a check engine light with p0456 (evap system leak) and p2A00 (bank 1 o2 sensor). Car runs rough at an idle but that started right after I replaced the stock engine mounts with z1 poly engine mounts, but I’ve heard no one else complain about harsh idling with these mounts so I’m hoping the vibration is do to it running just rough enough to not feel it with stock mounts but just enough to feel like crap with poly ones either way I might need an o2 sensor, I also smoke tested the exhaust and I have a leak between the manifold and z1 high flow cat on bank 1 but it’s after the o2 sensor which would make me think that’s not causing the code, here’s my o2 readings,
LT bank 1: -1.6%- -1.6%
ST bank 1: -10.9- 0.8%
LT bank 2: 2.3- 2.3%
ST bank 2: -14.8- -3.9%

 

just wondering why you provided fuel trim readings when you are asking about oxygen sensor fault code issue. long term fuel trim is an adjustment done by the computer over a duration of time or engine cycle/running and short term is immediate fuel trim adjustment based on whether if there is too much air or fuel. all parameters for the fuel trim are based on actual readings of the oxygen sensors themselves which you did not provide in your post.

 

That exhaust leak would throw that code even though its past that sensor. Fix that leak first before anything else