Steering problems

I am having some difficulties with my hellfire and can not figure out the source of this plaque. My steering servo is not turning the wheels all the way. It has been sitting for a few months and I just got it up and running and it will not turn the wheels all the way to either direction. It has a worse turning radius than my savage. The only difference is I am using 4 AA batts for my rx pack until my new rx rechargeable pack gets here.

Could this be the problem? hmmm