Originally Posted by fq06

With that radio you should be able to run 5 neutral width. It sounded like you couldn't get it to calibrate but looks like it did from this post ^

Try bump neutral width 10 higher than what you're at and if that works go down 2 until the problem comes back and then go up two to get it to work again.
That's the narrowest neutral width you can run with your radio.
With my MT-4 the NW is set to 5 but spectrum's usually want 10... all radios are a little different.

It sounds like the neutral signal is moving a bit and the ESC is in too tight of a range and not consistently seeing neutral based on the error code you mentioned.