low power light, may be a vac leak
This is sign for Tyre Air pressure issue (I got an answer from Nissan Service Adviser)
The TPM system in a 2007+ generation Nissan Altima has dashboard light that comes on when there is a difference in tire pressure between two tires. There is a U shaped tire image with an exclamation point in it, which means you have to check tire pressures on all four tires.
Low tire pressure.
An exclamation mark after a number is the symbol for the factorial function.
an exclamation point !
The exclamation mark on any sign is an alarm or warning. With a fire symbol, the sign is warning of combustibles nearby.
The Factorial symbol is the exclamation point. (!) This symbol means to multiply a row of natural descending numbers.
! is an exclamation.? is a question mark.
Usually, " warning!!!"
If it is to the left of the 1 key it is called the tilde key
The symbol "!" is called an exclamation mark. It is used in writing to indicate strong feelings, commands, or exclamatory statements.
You have a tire low on air.