No, you do not have to change the business code if you accidentally used the wrong code. Business codes are used by the IRS to categorize your business for statistical purposes only. The code you enter will not affect the outcome of your tax return. The code does not have any impact in your tax return it is used for statical purposes. However, it is always best to have all your information correct. The link below has information you may find useful.
https://ttlc.intuit.com/replies/3300135