I have a Gen 2 with 296K that just has the Red Triangle come on. Here's the symptoms: Red Triangle Car with ! in it on dash Battery gauge fluctuating Most recently fan came on from battery area - seems like a cooling feature but have never experienced this before. 296K on vehicle Where I am at: Took hybrid battery out. Tested and all but one was good. I will replace the one battery. Checked the 12V and seemed good. Will put back together and test though it seems like one battery would not create so much havoc. Codes are: P3190, P0446, P0A80, P0456. I'm not sure where to turn next. Evap code is a such a wide-ranging code that I haven't fixed this in a couple of years as it so difficult to diagnose. Kris
You're going to want to buy a load tester for the batteries. Check the capacity for each module and then balance the pack by pairing the strongest module with the weakest, 2nd strongest with 2nd weakest etc. Checking the module voltage alone won't be enough. Very important to balance the pack otherwise it'll trigger a code if the variance between one block and the next are too great in voltage. Good luck
Good luck with the HV battery. "Just" replacing a module has a very low chance of actually working. Usually the replacement module has different effective capacity and state of charge, so block voltage will be different than the others and end up with another P0A80 or P30xx (block yy becomes weak). LOTS of threads about this in the forums. That has nothing to do with P3190 (poor engine power). The ECM estimates that the engine is making less than 20% of what it should. This can be anything - fuel pump, water in the tank, MAF sensor, fuel injectors, restricted intake or exhaust, etc. In the big picture, a couple of EVAP codes are trivial. Posted via the PriusChat mobile app.
Prius Hybrid Battery Reconditioning "How To Properly Repair A High Voltage Nickel Metal Hydride (NiMH) Battery Pack For Hybrid Vehicles" the hybrid guy
This 100% correct. This IS NOT BALANCING, it is a crude form of equalizing block voltages. It might buy you some time but it is not a long-lasting solution. The greater the voltage disparity between modules in a block the shorter the fix. All modules (and by extension all blocks) need to be of equal capacity across the whole battery for the best possible outcome, which might be 2 -3 years if done well.
Hi! im new to this chat. I am learning myself but here is so far my experience i recently acquired me a 2nd gen prius last month, in my quest of getting this done right and learning how to drive a prius and ;earning the ways pof a jedi hybrid owner.. heres what i have done. ....... you are not alone... trust me... replaced coolant pump replaced inverter pump all of my modules are great! 7.89v each +/- .02 v although i have an old 12v battery its hanging in there i have "cleaned"and silicone "waterproofed"the hatchback seems saw the corrosion on the hybrid battery harness block 1 and 2 were fluctuatiing (on Torque Pro app since i was tryiong to be a cheap one; I "jumped"the wires on block 1 and 2 and hard wired them. because the harness was "compromised" at one point it worked! and then triangle came back. .. My Prius Guru Chris purchased a. new hybrid ECU and I purchased a new firewire #2 to arive on the 13th of March... I will fill you in for an update .. if that workls btw my hybrid ECU has the red sticker.. my guru purchased me a black sticker .. red triangle, VSC and check engine light is on.. now on "limp mode" will post pics and update soon.. I promise..
