What does it mean when my parking brake symbol flashes as I go around a curve? on 2002 Kia Sedona

About a week ago my parking brake warning started sounding and signaling when I am in a curve (at first only right turns). I live in a mountainous area and curves are numerous. I have pulled the release handle and checked the peddle to be sure it is not engaged. Now I am noticing poor gas mileage as well.

Asked by for the 2002 Kia Sedona
have you looked at the brake fluid level?
Agree, if fluid level is low, have the brake pads checked also! They may need to be replaced.