ABS hydraulic Unit?

[Maxo]

I'm getting an ABS code 2 (Broken or shorted solenoid valve circuit(s) in hydraulic unit - Right Front).
I was getting this code and a hot brake smell every day until I replaced my front calipers. That was over a month ago and now it's back along with a pull to the right under normal driving and braking.

Do I have to replace the entire hydraulic unit or is there some fix for this issue? Would a line flush help any?

I'd like to get it fixed asap but don't want to buy something if there's a cheaper solution (I've already spent far too much on this car).