I just put code for my radio into my car but now when it comes on it has no sound what do I do

There should be no related concern with volume when entering the radio "CODE" unless there's an underlying problem with the audio unit in the first place. Hands on testing is needed to make sure all is working as designed, and to note when it is not so it can be addressed. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops