It's interesting that id:1425 displayed a different message compared to what I have seen on my 1.5. But a new water pump took care of it and I have not had the message again.
The pump is readily available, manufactured by Bosch, and typically used for air/water intercooler applications. Replacement is pretty straightforward: remove the right rear wheel, fender liner, and it is simply sitting between the tire and passenger door. It's not secured, it just lays in preformed foam. Disconnect the electrical connector and the hose clamps then replace in reverse order. Napa is the only place I have been able to find propylene glycol coolant to top off what is lost during replacement.