New Stereo, check engine light on?
 

I have a 05' 1.8s sentra, i went to put a new deck in and after the install the check engine light came on. Please help i dont know what to do, there was an extra plug the cam out of the stock stereo but didn't hook in to the new one. Do i need to brige a treminal or what? oh yeah and when i put the stock stereo back in the light went off.