Per the manual (think in section 5 somewhere), to reset the TPMS, you have to drive around for a while over 16 mph until it resets. First you should check the tire pressure and make sure its above 27 PSI and also ensure consistency in pressure at all 4 tires. Then drive it around. If its still doesnt go off after a couple minutes you have an issue.

I just did this an hour ago and it worked.

Pardon the intrusion, guys--350Z owner here: Does all this apply to 350s also?? Cause I got new tires for my Z, early this year, and didn't get any warning lights and no resetting was necessary. Is that a 370 thing? Thanks for enlightening me!