Iphone 5 stuck in recovery mode with an error 2001

My iPhone 5 is stuck in the recovery mode. I have tried linking it up to iTunes by pressing the home key etc and managed to link it up but after resetting it to factory settings as asked and it removing software etc, it just comes up with the error 2001. Please help!

It has not been dropped, near liquids or anything like that.

It just started doing it one day after putting it on charge. It felt really hot when it was fully charged. Anyone have any ideas how to fix this?