The instrument panel on my 2001 infiniti goes out when driving sometimes but comes back on the next day when I start the car. Why? And how do I fix it this is a 2001 i30t.

. Check all under dash fuses with a test light or multimeter:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-3.html#post252145

. Check the ignition switch for wear, pitting, or melting.