All I did was unplug the radio and climate control unit to replace the factory radio and the code popped up. I can't reset this with my OBDII scanner?

So I recently bought a used V70 with 179,000 miles on it. Love the car and bought it as a first car for my son who's learning to drive. I've been driving the car and fixing a few things here and there such as the driver window regulator, replacing the radio etc...Very different than the Honda's I'm ...