Honda Odyssey: reservoir next to windshield washer fluid one.

Hi.

(1) A reservoir next to windshield washer fluid one - what is it for?
I dont have a svc manual and I'd like to know before I go to mechanic.
[White plastic reservoir above and slightly to the right if facing the
engine (the front).


(2) If it's below lower limit, can it cause check engine light on?

Thanks a lot!

 

1) Its the radiator overflow tank.

2) Open the radiator cap and see if the radiator is full. If the overflow
tank gets below minimum, air can get sucked into the radiator as it cools
and tries to pull the fluid back in from the overflow tank. If the radiator
is still full, all you need to do is raise the level in the tank with
anti-freeze.

It can't set a check engine light by itself, but overheating resulting from
nothing in the radiator could eventually light up something.

 

continued:

If you have a mid 90's Odyssey (I don't see a year mentioned), its the ABS
reservoir. If it is, there should be a tag on the top of it and a small
rubber cap. It should be filled with brake fluid. This can set the ABS
light if it runs too low.

 

coolant reserve tank, keep it between the 2 lines.
Chip