I've been using http://www.obd-2.com/ and the appropriate interface to read codes on numerous cars since '00. However, I wasn't able to successfully scan codes on my '08 G35 last night? Any thoughts on why?

For what it's worth, the newest cars that I've read are my '05 S2000 and '04 WRX. Just to make sure, I successfully connected to my WRX a few seconds before trying to read the G to make sure everything was working (i.e., software, cable, etc.).

I had to go down to the local auto store and use their scanner which worked.

 

Which particular codes? Also what kind of scanner do you have. Was the scanner connected prior to starting the car?

 

P01116 was the code that was triggered.

And yes, scanner was connected.

 

Make sure the reader can communicate with and is set to use the "CAN" protocol, which is what our G's are using.