It is oil change, tire rotation and air filter change. A12 means the A1 and A2 services--see the second page here for all the defintions: http://www.jonker.com/Honda/download_new/2006%20plus%20Civic.pdf
Oil Change
Check your owners manual but I believe its a maintenance reminder for your oil to be changed.
B12 means you need an oil and filter change, tire rotation, and air filter replacement.
oil and tranny fluid replacement
A code 10 is a Iat sensor. Intake air tempature sensor.
A 1 Honda Civic 8th Gen. : Oil change + Tire rotation
Change oilRotate tiresChange transmission fluid
It means: Oil & Filter change and a Tire Rotation
what does a service B12 mean for a Honda Civic Sedan
just wondering if the service codes for a 2006 pilot are available online?
b15 is the type of engine block that is in your honda
wat does b125 mean on a acura rl