It might take a while before NASA can safely give the all-clear. As we write this, Voyager 2 is just shy of 11.5 billion miles from Earth. Even with communication at the speed of light, engineers have to wait 17 hours to receive info and another 17 beyond that to verify that a command was successful.

Even so, it's notable that the probe is still viable in the first place. Besides the hazards of space itself, Voyager 2 has to deal with the decay of the radioactive material that provides power. It loses about 4W of available power per year, forcing the team to shut off equipment as the demands become too much to handle. While NASA can't prevent Voyager 2 from going silent (likely no later than 2036), it's clearly determined to keep the craft calling home for as long as possible.