I’ve Been Driving On P0A80 For 6 Months

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If the HV battery is still OEM and untouched, you may want to service/rebuild it. Otherwise it may be time for a new HV battery.

300k is a good run, are you the original owner and did you ever clean the HV battery fan?

 

Clearing any trouble code without doing anything about the problem that the code is telling you about only means the code goes away for as long as it takes the car to notice the problem is still there. Some problems get checked for more often than others.

The evaporative emission system codes might not come back until the next time the car does an EVAP self test. It's even possible you had a P0455 because of something like a loose fuel filler cap, and maybe you have put it back on tighter since then, and so the code really won't come back.

Meanwhile, the battery ECU tracks those module voltages all the time, so if you tell it to clear the P0A80 and you haven't done anything to fix the problem, it pretty much knows in real time that you're bluffing.

 

Hi you probably have electrolyte leaking out some of the battery modules causing high voltage leak therefore the car won't ready

Time to replace battery or at least swap some bad modules and clean everything up

If the back of the car has been getting wet you may find the p3000 relates to corroded and maybe burnt plug on voltage sensing harness and the connector in battery ecu, so a good used battery pack complete with wiring and battery ecu would be easiest choice

Cheers

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Codes would be different.

 

Yeah true and voltages are too close, forget that sorry! lol

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As ChapmanF pointed out, clearing the codes earlier gave you a temporary reprieve until the HV ecu figured out that block 7 still had problems. During this time the batteries deteriorated more and more. Now one of the modules in block 7 has failed completely (the much lower voltage shows that a cell has shorted). The ecu sees this and immediately sets all those codes- which all point to the failed HV battery.

Time to think about what you want to do now. Sell the car, replace the pack, attempt to repair- your choice (given that it has a bunch of miles, was abused for 6 months and has very wide range of static voltages- this pack will need a lot of work to function again).

The 2 EVAP system codes (P0441 and P0455) can only set after the engine computer has run the monitor tests for the EVAP system and has had it fail - two times in a row. Depending on the weather (esp the ambient temperature) and how you drive, it can take weeks before the monitor completes and passes or fails(and sets a code). The P0455 could be a loose gas cap, or it could be a failed fuel tank assembly. The P0441 might be a purge valve, or a fuel tank pressure sensor, or something else. Doesn't matter until you fix the HV battery.
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OK, what does that have to do with your problem? You have to do something with your HV battery. (there have been a couple posts about people continually clearing codes on a failing pack and having one or more modules burst with a bang).

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Given the list of DTCs in the first post, it would appear you're already heading down that path.

Were any of the above replies unclear, or confusing? (perhaps this one : I’ve Been Driving On P0A80 For 6 Months | PriusChat

 

people that clear codes and keep driving on bad batteries tend to think clearing codes fixes anything!

I bought a broken down car last year that I later figured out had ran out of fuel (amongst many other things!) to ad confusion it had been refilled before I got it, and no one mentioned it to me!

clearing codes won't fix that and if you keep trying to clear and ready a prius with no fuel it will fry the fuel pump and run hybrid battery flat in no particular order

Just a thought

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In another way of looking at it, you've been conducting an experiment into how long you can get away with clearing codes on a progressing battery failure without fixing it, and the experiment is shaping up to give you the answer "about six months" ... though you could wait for the loud-bang-and-bad-smells from the back of the car to find the outside limit.

Note to other readers: it's all very situation dependent ... don't assume you would also necessarily get "about six months" as the answer.

 

Very common practice here, especially with cabbies

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Having used the car for many years and many miles has "killed" the HV battery. It has a finite life span, and will wear out and fail at some point. It was dying 6 months ago- resetting the ecu again and again put the final nail in the coffin.

It is like asking "I wonder if turning the headlights on would cause the bulbs to burn out?"