Hi Everyone

I have a 2015 Odyssey EX. The odometer reads 46000km. The code A123 just showed up a few days ago. My main concern is the 3, which is about transmission fluid. I checked the color of the fluid and it looks decent pure red color. So I am not sure the code means the fluid is due for checking or due for replacement. I also wanna know what kind of transmission fluid should I use for it.

Thanks