From what you describe it's sounding like there might be a cable adjustment issue. I;d get that sorted and then see if the error code goes away.
to read a recent thread on this same issue.
(1) if the servo is clicking and making alot of noise when you jump across the diagnostic terminal it's fried. You maybe have discovered that from messing around with the dead servo that came on the bike before you took it off. *
(2) It's easy to fry the servo by tightening just one of the three cables too tightly and leaving it too tight whilst adjusting the other two cables.
All three cables have to be adjusted as a system.
You need to make sure that the flapper is adjusted properly (as per the manual) and then go at the HTEV.
When you adjust the HTEV, do so with the flapper adjusting locknut hear the servo loosened...otherwise the HTEV adjustment will be ineffective.
Be sure to take up the slack or give slack as is needed when you adjust the HTEV cable.
Be sure to loosen the flapper locknut near the servo when you adjust the HTEV.
Proceed in micro-baby-steps.
After each micro adjustment:
Check that the operation of the flapper and HTEV is per the manual.
Check that there are no binding cables.
Make sure that the servo is operating through its full range of motion when you jump across the diagnostic post.
Best of luck to you, my friend and I hope this is of some help.