Welcome to the Forum,Rebleed the Calipers and make sure the Pads are in correctly. Sometimes after that is completed you may need to check to see if the Rotor is warped. Check the Rotors inner springs and all the haedware behind the Rotor as well.
The Rebleeding is the first thing in case the Caliper is in need of some clean Fluid OR other work.
Depending on the Master Cylinder for the Brakes the fresh Fluid is and should be changed every 8'000/ miles. You can also Remove the Caliper and Squeeze Slowly to see if the Pistons come out and don't stick.
[Caution] You really need to be Carefull if you do that OR the Pistons will pop out. Make sure the Calipers Metal Tab is in place where the pads go up in the Calipers housing.
Usually you can leave the Pads in place put the bolt in this way while it is hanging off the Bracket there is limited space so the pads can be checked for movement it will also help to keep the Caliper pistons from Expanding out to far . Good Luck. *Jimi