Turbo Meter
 

NX is first turbo car I owned and I have no idea how to read turbo meter in the center display. During idle meter is pointing south at -0.75. When driving it is around 0 and I figure that is when turbo is working.

Could some please explain to me how to interpret turbo meter? Thank you in advance.

Your gauge is likely in MegaPascale's [mPa] since the numbers are so 'small', unlike aftermarket gauges which read PSI.

Here's a good read about your setup, yes it is Subaru but the same principle;
http://forums.nasioc.com/forums/showthread.php?t=367125

Wagnerian, in simple terms, anything above the reading of 0 means there is a net increase (+) in compressed air relative to the atmospheric pressure which equates to greater air volume, combustion, and therefore more power. A negative value is essentially the opposite (less air pressure relative to the atmospheric pressure). The gauge in your NX should read in psi x 10. These videos help explain a Turbo and Turbo Lag.

A turbo will slightly pull vacuum during idling conditions because its not doing any work and just pretty much...spinning dead on teh bearing.

When you're driving normally, the 4 banger is enough to keep it moving without any real work from the turbo, thats why you're seeing 0psi for boost. While thats not entirely accurate, its representative.

You will only start seeing boost when the car is pulling its weight and your foot is in the throttle some. At which point you'll begin to see a + register on the boost gauge.

Keep in mind, this a small hp, small turbo engine, there won't be a lot of applied boost.

Thank you everyone for the information. I have better idea of what I am looking at. You guys are awesome. :)

I'm guessing that this turbo meter is only on the F-Sport?

You'd be correct.

But as I've told many others, you can install one pretty easily.