Hey everyone, quick question. So the other day, my car (04 g35x) wouldn't start...but it tried to. Has new battery and spark plugs and was everything seemed to be fine...just wasn't starting and the VDC/Slip/AWD came on (safety mode). I took the key out then tried it again and everything was fine. Then today I started the car and it went into safety mode again...took the key out, then tried again and everything was fine; also there were no codes either time. Anyone have any ideas what's causing this??? 