P0A93 2005 Prius 259,000+ Miles

If you use google to search through this Priuschat site you can get loads of info about P0A93... The issue is your power inverter that in its simplest terms turns engine energy into electric energy gets hot and has a system to keep it cool in much the same way a car has a radiator. But the problem is Toyota bought bad pumps when they built your car and thus had a recall where they replaced pump for free. Not sure if that recall has expired yet, but if you go here: https://www.toyota.com/owners and set up your account with your VIN# they'll tell you what's up.

In the meantime if you're worried about expensive replacement job if you blow up your power inverter, refrain from driving the car when it's hot out. And if you don't have a choice you can buy a bag of ice at the store and put it on top of the power inverter in the engine compartment. Of course that's alot of water to have dripping on the electronics in your engine compartment, so use it as an emergency solution not a reason to procrastinate on getting repair done ASAP.

Lastly if recall has expired and you or a friend has experience replacing radiators or water pumps on regular cars, you won't have much problem doing the work yourself. There's plenty of posts on here that will tell you how to do that.

 

Should be ok, don't drive the car hard and stay off the freeway, just use surface roads. Don't drive the car more than you have to, until it is repaired.

 

10 minutes will barely warm up your car, so no issues

 

Unfortunately, you're probably looking at about a $500-650 dealer quote. The last one I swapped for a co-worker, she was quoted almost $650 to install a new inverter pump.

If you are mechanically inclined, you can do it for about $100. There's tons of videos on youtube on how to swap the pump by removing the driver side headlight. Even someone who has never done it before can probably do it in less than an hour.
You can buy a Toyota pump on ebay for about $65 delivered to your door.
You can buy a set of coolant hose clamp pliers for about $12 from Autozone (they have small medium and large in a pack, get 2 packs so you have 2 mediums)
You can buy new plastic rivets from Autozone for about 8 bucks.
You'll need a few ounces of coolant. SLLC (pink stuff) for your car.
You'll need a set of metric sockets and a ratchet.
You'll need to remove some plastic rivets holding the front bumper cover on the driver side.

If you watch some videos and believe it's a bit over your skill set, then I would look at buying the pump and having another mechanic install it. Post an ad on craigslist that you're looking for someone familiar with Prius inverter pumps to replace it for a side job. Probably plenty of Toyota mechanics that would do it on the side for a hundo.