Preheat your oven to 350 degrees F. Grease two (9×5 inch) loaf pans or spray with cooking spray.
Mix flour, baking soda, baking powder, cinnamon, nutmeg, ginger and salt in a bowl. Whisk peanut butter, oil, eggs, sugar in a bowl. Mix pumpkin puree with wet ingredients. Combine dry ingredients with wet, being careful not to overmix. Pour batter into two 9 x 5 inch loaf pans. Bake for 45-55 minutes or until a toothpick inserted in the center comes out with a few crumbs attached. Cool in pan for 10 minutes and then transfer to wire rack.