A polite way of saying "you screwed up, idiot, try it again."

A GPS says "recalculating" after you miss a turn it told you to take, then it comes up with a new route based on your current position. It doesn't call you a dumbass, it simply says "recalculating" which lets everyone in the car know you are a dumbass without it having to actually say so.

the thing that you don’t have when you’re phones percentage is over 20

The worst possible thing that you can hear in your car when using a GPS. There are few other sounds on Earth that can invoke a manic state so quickly.

While this term is usually heard when you miss a turn and your GPS unit in your car has to "recalculate" your route to get you to the desired location.

It is also the term to describe a persons life when it does not go as planned.