My nikon 17 to 200 vr lens is suddenly making a little grinding noise when i turn camera on..

ur VR is GONE or do not keep ur mobile near camera while using it

Your camera is still under the one year Nikon warranty. Call Nikon's repair depot at 1-800-NIKON-US (1-800-645-6687) 9AM-8PM EST, Monday to Friday. They will verify your warranty and assist you in returning it for repair.

Make sure the camera is set to auto focus and your metering is correct
Make sure the lens is set to A and not M
Make sure your body (the little switch on the front) is set to A and not M
camera reset may help, but may not
to do this turn off the camera and hold the two buttons with the green dots on them and turn on the camera

The Vibration reduction system does move components inside the lens. If it makes a lot of noise you are better off turning it off and using a tripod. The VR system will move lens components to counteract your motion. The steadier you hold it (camera and lens) the less noise. On small Coolpix cameras the sensor is moved to counteract the vibration while it is hand held.

Nikon guarantees 5 year warranty to original purchaser. If your camera functions with another AF-S lens, then the problem lies with the 18-200mm lens. The AF motor unit needs replacement. Nikon should be able to repair the lens under warranty.
Make a copy of your receipt and go Nikon website to start repair service.

The problem you are encountering is with the screw head interface between the lens and the camera body. They just are not locking together properly. Sounds like you need to send her in for repair.

The VR ring as came lose...you have to send it in.

Make sure your AF-switch on your camera and your lens are both turned on.

The lenses have a focus motor built into them.when the camera is set to auto focus, once you press the shutter button, the motor activates to set the correct focus. VR is for motion stabilization. Turn off AF on lenses and camera and see if noise stops.

You can take pictures ( without VR function ) by starting your camera from play button then switch to photo !
Lens error appear after a shock . VR mechanism have piezo actuators glued with epoxy resin together with an carbon fiber stick . After a shock applied this epoxy broke so no vibration from piezo is transmitted to slider . It is possible to repair ( cheap , only epoxy and izopropilic alcohol needed ) but skills are necessary

(i am not an english speaker so ....)