Reference pressure at 20 deg C:

Reference pressure is a temperature-compensated tire pressure referenced back to a standard temperature of 20 degree Celsius. This is useful and serves as a guide for the user to decide on the approximate amount of air needed to inflate the tire during hot season or immediately after a long drive.
 
The reference pressure reading is located above the actual pressure reading in blue with smaller font size. The user has an option to show / hide the reference pressure reading for individual profile by going to the “settings” at top right corner on the car status screen.