Codes P0700 and P0604

It is for the transmission computer internal failure. If you continue to drive it that way there could be a risk of the transmission being damaged. That is the safest answer I can give you. I cannot really say that it will or wont damage the transmission. All depends on how it effects everything. Also when something fails it can change how it fails at anytime, especially electronics. The best bet and safest bet would be to address the problem.