JDRL, Welcome to the forums. Code is : brake switch #1, circuit high
If you have discs (rotors) all the way around. Which brake is dragging?
Disc rotor's utilize calipers, and that would be the part that may need replacement when dragging is felt, with inspection of caliper and rotors and brake fluid bleeding completed after new calipers is installed.
It is best that both sides are done together, so that they have even beginning.
It is best with an ABS system that you consult a brake professional for service.
That being said with a shop manual, you can do a lot of work yourself and gain knowledge about the systems and vehicle you own.
Others may chime in regarding the specific code, as you may have two problems one that the code is relating to a brake switch, second being a caliper. The dealer would possibly be able to advise on that code via a phone call as well.