Inverter pump not working

My 07 prius started giving a p0093 error on long trips. The first time I looked at it and cleared the code to see if it was just a fluke. It was fine while driven short distances, but on a second long trip the same code came up about 40 miles after filling up, which may or may not be coincidence. I did some more research, and some signs pointed to the inverter coolant. The car is 10 years old with 240XXX miles on it. The inverter pump and water pump was changed in the recall (2012?) When i looked at it, i could hear the inverter pump working, but the fluid was barely moving. I ordered the Toyota coolant and I just changed the coolant. I've read several threads here and have tried to bleed it several times, but no fluids are moving. I push the power button twice, but there is no noise and no movement. I had the bleed valve open when I was filling it, and could hear it gurgling and bubbling. Eventually fluid came out the bleed valve, and I closed it. Now, nothing is moving. My next step is to drain it and flush it, but I thought i'd post here first and get some better ideas.

Thanks!

 

That was the code that it gave, but my reader might be old. My newer reader wouldn't connect to the car, and the car has since reset the code. This was last week, and I was out of town. But that does help, thanks!