Prius (2004-09) :: False Positive P0A80 - Replace Hybrid Battery
Mar 4, 2015
Recently my 2nd gen Prius has been acting, strange. I hoping to get some insight to the best way to fix the problem, so I will include as much detail as I can.
Over the weekend I went to go run some errands and while I was leaving my neighborhood, my dash lit up like a Christmas tree, with the red triangle, CEL, low tire pressure, and the exclamation on the MFD. So I quickly turned around and parked it back in my garage.
A little later and after doing some research on the forum here, I began to troubleshoot, at which point the feeling of dread was at the pit of my stomach and decided to go to the local auto store and have the code read. It was of course the "P0A80 - Replace Hybrid Battery Pack" the exact message I didn't want it to be.
So I turned around and went back home, the entire time all the lights stayed on and monitored the SOC of the traction battery. It was charging, just increasing and decreasing quicker than usual.
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I have 2005 Prius with 300k miles. I started throwing P0A80 code. I removed the battery and checked all the modules and found 2 of low voltage, ordered them from Ebay and replaced them. I placed the battery back in the car and started the car but got P0A80 code again. I purchased the grid charger from Hybrid Automotive and connected it according to their instructions for 24 hours. I drove a car but got the red triangle again and P0A80 code again. I removed the battery again and tested the voltage of all the modules and these are the readings:
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I turned on my car this morning to find myself faced with a variety of colored lights, including a little red car on a black bar on my MFD. Drove straight to the dealer and received word that the car was throwing codes P0A80 and P3023 and they recommend replacing the hybrid battery. I have a 2006, have done all the recommended maintenance at the dealer and it has about 133,000 miles on it.
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I have a 2007 toyota prius. The car drives, but pulsates. The Check engine light and triangle of death are on. Diagnostic test says "replace hybrid battery pack", but wouldn't the car not even start if the bat pack were dead? What it could be? perhaps a bad cell or two? a bad ecu?
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2005 Prius shows a C1241 code, which can mean abnormally high or low positive voltage in the auxiliary battery. In my case it appears to be abnormally high, because my voltmeter showed the battery charged to 18 volts with the car off, and when running it showed 20 volts going to the battery. There's also a POA80 code (hybrid battery pack) but I'm not convinced yet that it's a hybrid battery problem. What would cause the overcharging of the auxiliary battery?
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I've pulled the HV battery from my 2007 Prius with 144, 000 miles given recent Red Triangle of Death (P0A80) and looking to replace battery pack but want to rule out the ECU. I've searched the threads and found mention of testing the ECU but wasn't clear.
How to test the HV Battery ECU in or out of the car? Using a volt meter and light bulb, etc......I would really like to rule out the ECU before putting dollars in a rebuilt battery pack.
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I had a 12v battery issue that I see common. 12V battery does not crank car. Jump car and works fine for a few days. I had this issue and it went away. Dealer said replace 12v battery, or just carry my charger pack with and use that unless it gets worse.
Jump ahead 2 months. I drive 50 miles each way to work 5 days a week. No issues. Yesterday, after my car sitting all day, I am backing out of driveway and get the red triangle. Code was P0A80. I looked it up. I cleared the code and was going to dealer if it came back. Today, after driving 50 miles into work, no issues, I get the red triangle. Code P3021. Fan started running back there too
My question : Would replacing the 12v battery useful for this issue?
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Have replaced dead cells on wife's HV battery over a month ago. Threw this P0a80 code today and will barely move. She idles into dealership and they say it's the battery, really!
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Got a recall letter last January from Toyota concerning a false warning light on my model. Letter mentioned that moisture in the cables was triggering a false warning message about the main battery. My 2002 was having this problem. The dealer refused to do the work. Told me they did that recall work in 2006 but I did not have the problem back then and Servco Hawaii told me that Toyota had not put that out as a recall back then. The light has gone off and on now for a year. Car drives perfect otherwise and only have 60,000 miles on it. What do I do?
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I have a 2002 prius with 143,000 miles. On Friday, I went to start my car and put it in gear and the check engine light came on and the "triangle of death" lit up and car died. I turned it off and waited about 30 seconds and tried starting it again. It started and I drove 1/2mile home. Went into the garage and got the Actron/OBDII code reader. Pulled the code P3125 which when I googled it, it was referring to the inverter. I cleared the code and all was well.
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About 1500 miles ago, I replaced a cell in the battery pack. Now the triangle of dead is back and the code is "replace battery pack" again.
I tested all the cells and here are the results.
(the previous one I replaced was 4.5 volts, very low and easy to find)
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Was crushing around and received the red triangle, check engine, DSC, etc. pulled two codes from my scan gauge P3022 (bank 12 low) and PoA80 (replace hv battery). Car was in limp mode, engine running full time, battery gauge showed hv battery depleting.
After reviewing other stories online, seems as though I might be looking at a new battery. Car is 2006 with 112,000 miles.
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My concern: The hybrid battery, or the monitor really, has never, ever, not once, shown an all-bars charge. It is almost always at one bar down, and will drop below that but never goes above. My brother has a Gen I and his battery shows all bars from time to time. Not mine.
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My hybrid battery has been running low the past few days. This has never happened before, but it has been around 90 degrees out during the same few days. I noticed it this morning as I left for work. It was down to two bars when pulling out of the garage. I was getting pretty nervous, but at least the ICE was charging it. Although, it never fully charged the system, as I live pretty close to work. On the way home, I tried to drive around for a mile or so to see if I could get the battery fully charged.. The best I could do was four bars. Is this typical of the hybrid system in warm weather? Should I be worried about it? Also, the system has a fan, why doesn't it come on if the hybrid battery is so temp sensitive?
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I recently purchased a used 2007 prius. The car has not been driven for some time. I won it in an auction from a used/wreaked car lot and am in the process of fixing it up. I need to know if it is possible to charge the hybrid battery when the car is idling or will this only discharge the hybrid battery and if so, is there any way to charge the hybrid battery other than driving the car?
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i have a 2006 with almost 200k miles. Got the red triangle, check engine light, and the red car at the top of the MFD. I ran the codes and got P3000. Does this sound like traction battery failure? The car still turns on and ICE still cycles off and on.
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I changed a bad cell in my hybrid battery (only one cell was bad) and put everything back together and it wont start. I've double checked all connections, fuses, everything I took off. I put the orange plug back in, fiddled with it, pushed it in more. It's got a brand new 12V battery and I dropped it off at autozone to get it charged up as well. Here are some pics and what it's showing .....
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I have a 2007 Prius with 107k miles. Last July it had a minor drivers side front end collision. Last November it had the hybrid battery replaced. I believe all this is unrelated just putting it out there for information.
I am currently having the red triangle pop up intermittently. When it does a "problem" message will display on the MFD. This seems to occur most often after a long downhill or when the Energy display is showing the hybrid battery is nearly full.
The hybrid battery seems to be functioning normal and the car is driving normal and has expected fuel economy. I do have a headlight that cuts out occasionally but no other noticeable electrical problems. I do not have a diagnostic device to get the codes.
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A year and a half ago, I had the hybrid battery warning lights come on and had it towed to the dealer. After given the option of replacing the battery for $4300, I took it home and did a single cell replacement (all cells ~8V, one at 6.6V which I replaced), which seemed to be all good until yesterday. Back with the warning lights and blower fan, I jumped to the conclusion that I have a similar situation, removed the battery and all cells are 8.04V +/- .05V except for 1 cell at 7.92. I am not convinced that this cell is really the culprit.
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Just got a 2008. The Hybrid Battery Status indicator on the display is usually yellow. it will sometimes switch to blue. I assumed that yellow was the correct color but after reading some posts here it seems that they should be blue.
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Can we check the health of the hybrid battery like you can the 12V. I encountered an issue where the hybrid battery had difficulty getting a "full" charge. It would frequently be in the three to two bar range which got my attention. I did learn that there is not a way to check the hybrid battery. I also have not encountered the problem since crossing the great divide on the way back ....
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