I changed all my plugs and coils on my 2009 G37. Buttoned it back up and it will not start. It acts like it wants to but no-go. I did forget to unhook the battery...? Did I poop the bed on that? It's throwing me a p1233 code.

 

The P1233 is a throttle body related code. Did you unplug the TB when you did your plugs and coilpacks or just moved it aside with it plugged?

 

I unplugged it. But I figured out what happened. One of the hoses that run into the air intake had a split in it. Replaced the hose and it fired right up. Did the relearn steps and she's back on the road.

 

when you said it didn't start, did it try to crank over at all or did it just go to accessories mode and not turn over?