Toyota Prius Problems

Check Engine Light Due to Failed Power Inverter Coolant Pumpl on Toyota Prius

Problem Description and Possible Solution

The power inverter coolant pump may fail resulting in illumination of the Check Engine Light associated with fault code P0A93 stored. Our technicians tell us the power inverter coolant pump should be replaced if this occurs. A revised pump is available for 2004-2006 models, Toyota service bulletin #EG001-07.

(40 people reported this problem)

Toyota Prius Vehicles With This Problem

RepairPal Verified
Average mileage: 108,735 (50,000–213,000)
Engine affected: 1.5L 4 Cylinder
7 model years affected: 2004, 2005, 2006, 2007, more2008, 2009, 2014
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Viewing 1-13 of 13 comments
The car starts fine. It drives fine for a while and then the AC stops working. Soon after that the big triangle red ligt comes on. If you keep on driving and alarms starts ringing and the brakes take longer to engage. If I turned it off and wait a little. The car starts again w/out a problem. Then it does it all over again. Times vary. Already changed small back battery and the problem persists.
Air conditioner was blowing hot air. Took my car in to Toyota and they quoted me $7400.00 to replace the inverter! What???
All warning lights turn on after driving a certain speed on highway after about 10-15 minutes driving time
I had the same problem and I called Toyota they also said my car is not part of the recall. Yet the problem I had is exactly the same as they described for the recall.
Red triangle, yellow "brake" warning light, VSC, and check engine lights went on simultaneously. Towed to dealer. Dealer reports failure of Inverter water pump. Cost to repair is $516. My car is still in the shop.
I got my Prius cooling coil replaced and on the way back home I tested the car by pushing it down and next few minutes...I wan standing on the road looking at the most illuminated panel of my car...the mechanics failed to check the coolant level and the car had gone hot...the system shut down the ac system and with temperatures ranging in 40 Celsius it was difficult to sit in the car especially with its blower was throwing hot the car checked through Toyota and they say it's related to inverter cooling system which might have gone faulty.....anyways the car will be sent to workshop on Monday next and than we will see what does it cost to have it repaired / replaced....needless to mention that Toyota does not cover such reported and established errors in Pakistan.
I had the dealer replace the The power inverter coolant pump may fail,
there is a recall for this issue but the dealer said that my car does not show this recall , so I end up paying
$350 or so for this servive,
Second time this has occurred - around 40,000 and now 59,000. Toyota just issued a recall.
Same as described. Dealer had car for 2 weeks. "Cooling pump inverter on back-order"
Am picking up today and will se what they charge, if anything.
I think this should be covered under drive-train and/or hybrid battery warranty.
Pump just failed returning from a 3-hr road trip. Opened the coolant reservoir and determined that no coolant was flowing. Have not yet fixed it. Doing research first.
All repair lights came on while driving on interstate; car began lurching and went in to safety mode with A/C shutting down. Cost of repair via dealership $532.00. I just had the hybrid battery replaced for $3,600 at the end of June 2017.
I have One Toyota Aqua Hybrid Year 2014 . My car start fine drive Ok but after 2 to 3 kms the speed automatically reduced .
We used the computer to check the fault its showing the water pump of hybrid cooling system is not working properly but we still not sure. Looking forward to hear you .