It means that (1) it is time to get your oil changed and (3) it is time to get your Transmission Fluid changed. It is explained very well in the owners manual under "Maintenance."
Oil Change Time
Wat does service code wat mean on a Honda Odyssey
According to manual, this is a reminder to change coolant.
What does A15 mean for a 205 Honda Odyssey
The code A123, in your 2008 Honda Odyssey, is a reference that the air filter may need to be changed. A code should reset after changing the air filter.
From the 2006 Odyssey Manual: A is an oil change, 1 is rotate tires and 4 is replace spark plugs, and timing belt. Inspect water pump and valve clearance.
It means its time for your car to be serviced
what does code b 124 mean
Trouble code P0505 means: Idle control system malfunction
You would need to look it up in the owner manual.
An explanation of service codes are on page 612 of your owners manual.
A12 is oil change, tires rotation and Air and Pollen Filter Replacement.