Car won't start? (seems like a unique issue?)

[Fallen2Sleep]

I purchased my 2009 370z from CarMax about a month ago. Recently, I've been I went out to breakfast, and after coming back I attempted to turn on my car. No good. I have the red warning light (in the shape of a car with a key on it). According to what I've read, this is the infamous 'steering column lock'. I peaked under the column to look at the revision, and i have RevD? I have heard about A-C failing, but havent heard about D failing. My key works as far as unlocking and locking my car so I'm assuming that a low/bad battery is the issue. In the meantime, I'm without my daily driver. I'm a United States Marine, so luckily, I LIVE at work =_=

Help would be appreciated, going later today to buy a 3v key battery in case that is in fact the problem (doubtful).