A washer-fluid warning gives you a chance to refill before windshield visibility becomes a problem. Identify the correct reservoir in the manual and use fluid appropriate to the temperatures you expect.
Plain water can freeze in cold conditions. If the warning continues after a proper refill, or the nozzles do not spray, the issue may involve leakage, sensing, or delivery rather than fluid quantity alone.
Tell Cherry City Transmissions in Salem whether the pump can be heard, whether either nozzle works, and whether fluid appears underneath. Avoid repeatedly operating an empty or frozen washer system.