You need to reset the ECU (borrowed from JORGEOLIVEIRA on my350z) to find out the code, thus telling you what is wrong with your car
1. Turn the car to the ON position for 3 seconds
2. Completely depress the throttle 5 times in 5 seconds (once every second)
3. Wait 7 seconds (no throttle)
4. Fully depress throttle for 10 seconds until SES light starts flashing and release
5. The SES light will flash 10 times slowly to let you know its in diagnostic mode
6.Following the 10 slow flashed it will show you the code with fast flashes (fast flashes...pause...etc.) so code 303 for example would go (3 fast flashes, pause, 10 fast flashes, pause, 3 fast flashes, 10 slow flashes) The 10 slow flashes signify the end of the code.
To reset the SES light...
1. After doing steps 1-4, fully depress the throttle for 10 seconds.
2. Turn the ignition to the OFF position
The fault codes are here http://www.my350z.com/forum/forced-indu ... codes.html (links to another site)
Hope this helps
Oh.. and Welcome