Depending on the length of time the power was interrupted, your system may require GPS initialization.

If initialization is not necessary, the system proceeds directly to the Startup Confirmation screen.
If the system fails to locate a sufficient number of satellites to locate your position within 10 minutes, the following screen is displayed.

If you are experiencing GPS reception problems:
Information
This chapter includes your vehicle’s specifications, locations of
identification numbers, and other
information required by regulation. ...
Throttle Body Disassembly/Reassembly
...
Tire Pressure Monitoring System (TPMS) - Required Federal Explanation
U.S. models
Each tire, including the spare (if provided), should be checked monthly when
cold and inflated to the inflation pressure recommended by the vehicle
manufacturer on the vehicle placard o ...