why does the engine light and skid light come on when it rains

What is your question?

The Rav 4 truck only has 48K on it. It run fine. Occasionally when it rains hard both the engine light and the skid light come on. When the weather dries up it goes off. It just passed inspection and nothing is wrong with the omission system. I do not have a loose gas cap. I have taken in numerous sometimes they just reset the system other times they check the entire system. It appears nothing is wrong with the truck. I took the vehicle to a body shop this morning and they told me nothing is leaking around the molding or window.

What makes this problem better or worse?

After heavy rain

How long has your 2009 Toyota RAV4 had this problem?

It has happened a few times