If you have a friendly camera shop nearby then you could do a quick test. Your lens on another camera body and a different version of the lens giving errors on your camera body. This will help you narrow down the fault to camera or lens.
The only time I have had a lens give an error was when I did not seat it correctly on the camera body. It happened a couple of times (when I was a newbie) so now I make sure everything is aligned when switching lenses.
Nikkor AF-S DX; 18-105 f/3.5-5.6G VR, 55-300 f/4.5-5.6G VR, 35mm f/1.8G
Speedlight SB-700 http://keystrokesukimages.com