Question about 2004 Toyota Prius

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2004 Prius Check Engine Light - code POA93

I have a 2004 Prius and the check engine light came on. We took it to the dealer and they said the code was P3108. They reset it and could not get it to come back on. They said they thought the visor mirror light may have been on , draining the battery. We turn off the switches to the visors to prevent this but a few days later the light came on again. We were at a body shop getting a few dings repaired and he tested for us and the code he got was the POA93 - Drive Motor performance. He reset it. We called the dealer and they toke the information down and said bring it in if the light comes on again. Has anyone experience this? Any thoughts what might be causing it?

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  • bonnycharlie Jun 18, 2008

    yes, as we were leaving town for the mtns of n. ga on 6/13, 5 miles

    outside of town several dash lights came on.....the hybrid light, the brake warning light and one on the nav screen. long story short, we ended at the local toyota dealership, they said the hybrid system was detecting an impending failure of the water pump and that the poa93 code indicated that the inverter fan was going to fail b/c of the water pump. they said that they warrentied the pump for 60k miles and we had 59.8k on the car........ptl. they gave us a loaner, kept the car scheduled the repair and called today, 6/17 that it was ready for p/up tomorrow am. treated very well, but still a bit skeptical and feeling like the other shoe will drop on my head soon. thus far only major prob we've had that i did not create myself.

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P0A93 is an inverter cooling problem. The inverter is cooled by a dedicated cooling system, which consists of an electric water pump, cooling fan, and radiator. This cooling system is independent of the engine cooling system.The mechanic should check if there is sufficient amount of coolant for the inverter, check if the coolant hose is not bent or clogged, if the water pump / cooling fan motor connections are ok, and of course if both of the cooling fan motors are OK.

P3108 is generally loosing communication with the A/C system control module. This can usually be solved by checking the wires and or the converter inverter assembly.

Posted on Jul 30, 2008

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2004 prius location inverter and inverter water pump code poa93.

Posted on Apr 06, 2010

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