Few problems on my Z

Bluechic

Hello.

I have some issues on my Z and already google it to found someone's thread who had similar problem with me. But, I'm quite not sure what should I do for it.

So, after driving few miles, a VDC off light comes up and doesn't disappear until engine turn off. I guess, it might occurred because of brake pad, broken sensor or tire&its air pressure. How to figure out the reason?

Second, Sometime, when ignite the engine, it just shut down immediately. It doesn't happen usually but happened.

Third, I can hear some noise that it sounds like grind the iron when I shift the gear. (from lower to upper)

My Z is 2010 and manual transmission with 90k miles. If there is a serious problem, I will bring my Z to Nissan service center to fix it but want to make sure so I can pay the money for it. Thanks.