This one not in the manual. Shows car with skid marks behind each rear wheel. What would that mean?

It's a bulb out indicator. Could either be right, left, or center. Or either in the trunk lid.
Same goes for taillights. Have your lights checked!

https://www.askmehelpdesk.com/cars-trucks/when-asking-about-your-vehicle-303903.html
Maybe you could post a picture, too..

Traction control or stability control

Year and model would help, I am with bigbrew on this.