What means A12 on the dashboard

A13 is broken down to A, 1, and 3.

A means you have to change your oil.
1 means you need your tires rotated.
3 means you need to change your transmission fluid.

In trip 'A' mode, hold the trip reset stick in and turn ignition to 'on'. Do not start car! If it does not reset, you have a computer glitch. Live with it!

a12.

i guess you lost the operators guide in the glove box,
try reading that, I promise its there, and dont drive cars with out it.
or you will get stranded. I promise.
RTM ,

this is Scheduled Service EPA BS warning.
here ill google for you, see 1/2 million hits.. sure.

https://www.google.com/#q=2006+honda+a12+lamp

i guess your not the only honda driver...... LOL

Can you be more specific? What year? Do you mean a replacement dashboard? What exactly do yo mean?

Google----OBD2 Dashboard Symbols

It is a service due code.

It is an oil change and oil filter, a tire rotation and air filter change. A12 means the A1 and A2 services are due, hence A12

A means oil and filter change
1 means tire rotation and
2 means replace engine air filter and cabin air filter
hope this helps

Go to a grage!! DUH

Owner manual, or go to the library and see if they have the factory service manuals for your car.