No, not really. You got bad info.
If you didn't do anything else other than push the pistons back to fit new pads, ABS doesn't enter into the equation.
More likely you accidentally tweaked or otherwise fucked up one of the ABS wheel speed sensors while you were doing the brakes. Check em out and get back to us.
Originally Posted by Mercury264
Really ? Damn, all I did was push the pistons in I didn't crack any lines or anything.
I knew ABS was going to be a total PIA