my 2012 toyota prius all of the sudden will randomly trip a P0AA6 voltage leak code on a first start after sitting for over a day but as soon as i clear the code it doesn’t come back regardless of how much i drive or start the car throughout the day. i thought it could have been the HV connector under the large coolant hose on top of the transmission because coolant had been leaking onto it and some coolant spilled on it from fixing the leak but i just pulled that connector off and it looks dry and corrosion free in there. what else should i check or could it be? i had a gen 2 prius with the same code but it was due to the battery leaking but that code would trip immediately and wouldn’t allow the car to go into ready mode at all. while this one still functions and drives normally and just shows the warning until i clear it then it doesn’t come back for atleast a day.
Was your OBD2 codes reader able to retrieve the related INF (aka subcode, or detailed code) for the above DTC P0AA6?
+1 on the INF codes. If you can get them, they will save you the first part of your troubleshooting (is the fault in the inverter, transaxle, air conditioner, battery, or frame wiring?). If you can't get the INF codes, you just have to start one step further back, and narrow it into one of those areas using other methods. From that point, once you know which of those areas it's in, the rest of the troubleshooting is the same as if you had the INF codes to tell you that.
i don’t think mine does any sub codes i guess i’ll just have to check the ac connectors next and see if there’s anything there my ac doesn’t seem to work very well sometimes even though the pressures are good so maybe that’s something
This image is for a Gen2, and may apply to the Gen3 as well, it could give you an idea of where to look once you have the related INF(s) : Will assume that you don't already have the gen3 repair manual or the workup for DTC P0AA6, so we will now ping @Mendel Leisk
