Prius (Gen 2) :: Can HV Battery Individual Modules Be Scanned For Fault Indication

I have 05 Prius, 97,000 miles. Noticed the HV battery charge level indicator moves up and down rather quickly and often. It rarely shows full charge and this condition seems to be worsening. This is with mostly city driving.

I'm concerned that the HV battery won't last much longer. To make matters worse I had recently moved to AZ heat, though my Prius is garaged, the heat can't be good for it.

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Prius (Gen 2) :: Decoding Of List Of Codes

P0000

P002B

P003A

P001f

P0023

P0034

P0043

P0050

First time I see an error code 7.5 years into the car.

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Prius (2004-09) :: Codes P0A80 And P3023 - Hybrid Battery Replacement?

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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Prius (Gen 2) :: List Of Error Codes, Cruise Control Won't Work

This is a 2006 prius with 180k on it, that we have had since 2007 and it has been wrecked. (hit a deer) It had problems when the coolant flow control was hooked up in reverse after it got back from the body shop, but the toyota dealership fixed it. 12v battery replaced a year ago and showing 12.7v with no drain and 11.9 with a drain, on the onboard monitor.

My wife got gas yesterday and after restarting the prius, the dash lit up like a Christmas tree. ESV, Check Engine, RED TRIANGLE of Impending Doom. It was also sluggish(hybrid drive didn't seem to work, only gas) and did not seem to charge the battery. Also the battery fan was very loud but working fine. These were the same symptoms exhibited when the flow valve was reversed. Also the battery was showing 1 bar of charge when she got home. The cruise control would also not work.

So now, I take it to the parts store and connect the computer and get these codes

c1289 MV System Regen Malfunction Current

1310 Malfunction system current

p0a80 Replace Hybrid Battery

P3022 Battery Block 12 weak

p1116 Coolant temperature sensor stack

p1121 coolant flow control valve

I know that the p0a80 is bad and the p3022 means there is a weak cell, but I am having trouble here:

On the way back from the store, the hybrid battery charged into the green, which it WOULD NOT do earlier, but the hybrid drive did not seem to be pulling the car. The car cranks and gas engine runs fine.

I was wondering quite a few things here.

Would the coolant codes be remnants of the last problem and not deleted from last time?

The codes had no date that I saw.

Its just that all these errors and symptoms together make no sense when I am trying to troubleshoot and figure out a course of action.

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Prius (Gen 2) :: Headlights Stayed On And Drained 12v Battery

I was waiting in the mall parking lot. I never got out of the car, so the headlights stayed on and drained the 12v battery. A good Samaritan "jumped" the car with a portable jump-start device. The next morning, I hit PriusChat and found out about the system diagnostic. It shows that battery has one foot in the grave and another on a banana peel - 12.1v at rest and dropping to 9.8v with the dome light on for a few minutes! Back to PriusChat to research replacement batteries, their sourcing and installation.

I have an Optima Yellow Top on order, as well as a pair of those jump-starters (One for the Pruis and one for the pickup). Before I install the new battery, should I have it trickle-charged overnight?

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Prius (Gen 2) :: 2006 - Battery Drained, CEL Lights Came On

My wife and I bought a 2006 prius almost a year ago and after going away for several weeks we came back with the battery completely drained. I was able to charge it back up. But after that, on the very first drive, most if not all CEL lights (Check engine, the triangular sign, ((!)), VSC) were on. I figured it was probably related to the battery that got drained since we had no problems before, and after all these warnings came the vehicle does not drive any different.

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Prius (Gen 3) :: Battery Drained When Left Parked At Night

Battery was fully charged when left it at night that in the morning the battery level would be less. This happened to a friend of mine twice so far.

The first time it happened she accidentally left the lights 'on' which supposed to turn off on their own after 30sec. But in the morning she's only left with 2 bars from fully charged. And a week later it happened again but without leaving the lights 'on', from almost full charge to 3 bars of battery in the morning.

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Prius (2004-09) :: 12V Battery Drained And AC Stopped Working

I've had a 2004 Prius for about one year. It has ~120K miles and has been a great car. We left a light on, and the 12V battery died. We jumped it and everything seems to work fine, except now the air conditioner isn't working.

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Prius (2004-09) :: 2007 Won't Start After 12v Battery Drained

Loaned my car to a friend who left something on and drained the 12v battery. Some "good person" tried to jump start the car and was unsuccessful. When I got there I attempted to jump start from the front and direct to the battery in the back, both unsuccessful. After having it hauled back, I charged the battery with my charger, no luck. When I put the keyfob in, press the break, and push the power on button; get green light on the power on button and a check engine light on the panel. This 12v battery is original battery and car has 100K miles.

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Prius (2010-12) :: Battery Drained For No Apparent Reason

Just had my first battery boost for my year-old Prius 2K10.

This morning I went to start the car, it didn't open the door for me, then I had all troubles in the world turning the key ... And obviously nothing was opening, no lights, nothing.

I had my car boosted. First time they put the booster, I couldn't start the car (everything showed up but starting the car didn't start the conventional motor - the lights were all on). They unplugged it (everything disappeared yet again) and plugged it back in ... Then I could start my car. Of course, everything was reset: time, trip meters, everything.

That's where I noticed my battery indicator was half-full.

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Prius (2010-12) :: Auxiliary Battery Drained Overnight Twice Within One Month

I just bought a certified 2010 Prius and have had it for 3 months now. Twice within one month, there was absolutely no power to start the car because the aux battery went dead overnight. I'm pretty sure I didn't leave any lights on and don't think I did anything differently when exiting the car for those 2 times. I took it into the dealership, and they couldn't find anything wrong. They said the battery was good. What is draining the battery overnight?

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Prius (2010-12) :: 12V Battery Fully Drained / Car Won't Jump Start Either

The 12V battery must have been drained completely over the weekend. None of the lights (interior and exterior) are working. The car won't start even using jumper cable. I guess the 12v battery must have some juice remaining to power up the computer in order to jump start the engine. Am I correct in this assumption?

My Prius is only a little over three years. What is the warranty on the 12v battery? I read that the OE battery is not the best. How long would I expect the OE 12v battery to last?

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Prius Plug-in 2012-15 :: Car Left In Idle For Two Days - 12V Battery Drained

Yesterday when I went to start my week old PIP, the battery was drained. There was no power to start and no power to the dome lights etc. I got out the owners manual and on page 594 there were instructions to jump start which I did. I drove it to the dealer and they checked it out. They said the 12V battery state of charge was 50% after being jumped and driven for 30 minutes. They then charged it to a full state of charge. They couldn't find any other drain overnight.

I am trying to determine why this happened. The reason was not apparent. No interior lights were left on. There were no other electronics attached. We had driven the preceding two days in EV mode virtually exclusively. I don't recall if the ICE came on. The car sat unused for 36 hours. It had been plugged in to charge the traction battery and it charged via the timer without any apparent errors.

The service tech wondered if the battery had been fully charged prior to delivery. I know the traction battery had not been fully charged because I was anxious to take delivery. Could this be a consequence of driving in EV mode almost exclusively?

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Prius (2010-12) :: Battery Drained After Left Air On, Loud Sound That Continues

About a yr ago I bought a 2010 Prius with about 36,000 miles on it. Now I'm just about to crack 50,000. Late into the winter I began hearing this sound and thought it was odd. I figured it had something to do with the fact that it was winter and the engine/battery were working together to warm the car up as well as charge the battery. I took it to Toyota this past week and of course the "Service Experts" claimed this was "normal" as one of the managers owns a prius and claims they all do this. I know this to be false due to having owned one for a year now as well as reading up on a lot of the great info poster in here. Now in the defense of the mechanic that day, my battery was pretty well charged. The sound isnt nearly as harsh when the battery stays at or around half way charged.

Today while doing some cleaning inside my car i left the air on. As a result my battery drained low enough for the battery to begin charging. This brought on that miserable sound that continues to get louder and more noticeable with time.

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Prius Plug-in 2012-15 :: 2014 Battery Drained Although Charged Overnight

I went to drive to work today and found that my battery was drained. None of my interior lights were on and I'm 100% sure I turned the car off last night after I backed it into the garage. Last night I drove the car home and was mostly on EV, but drove the last 3-4 miles on ICE. I had the car charging overnight too. This morning, with the battery dead and the cable plugged in, it was making a click sound near the fuse box when I tried to start it.

The passenger seat's heater was on (I think) and I don't think any of the doors were ajar. The only door that could have been opened would be the driver's but I don't think it was half closed.

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Prius (Gen 1) :: Auxiliary Battery Drained - Random / Multiple Cylinder Misfires Detected

I left the key on and drained my auxiliary battery(It was weak before) and when I jumped it it started and then shut off after ~20 seconds. I tried various different things and all I succeeded in doing was draining my HV battery from starting it so many times. So I disassembled the pack and recharged it and now it starts and runs but it is misfiring. It throwing 4 codes:

P0300: Random/Multiple Cylinder Misfire Detected
P0302: Cylinder 2 Misfire Detected
P0304: Cylinder 4 Misfire Detected
P1305: Ignition Coil 2 Primary Feedback Circuit

I inspected the igniters and plugs and they seem to be OK and I'm not sure where to look next. I'm not sure if the battery issue is related or not but I did replace the auxiliary battery.

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Prius (2004-09) :: Rear Door Opening Button Won't Work After Battery Drained

I had problems with the 12v battery, it was drained and I had to recharge it, which meant disconnecting the negative/ground/earth cable. Ever since the rear door opening button on the outside of the car won't work.

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Prius (2004-09) :: EV Mode - Battery Drained Pretty Quickly And Petrol Engine Kicked In

I am pretty new to Toyota Prius. Today I went to test drive a jap import 2nd Gen 1.5 Prius with 50k miles. What I found weird with the car was that, on the startup the petrol engine also started and it was on for the duration I was driving. I then turned on the EV mode and the petrol engine turned off but looking at the battery capacity on the screen, the battery drained pretty quickly possibly (2-3 minutes) and the petrol engine kicked in. Is this normal for 2nd gen prius cars ?

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Prius (2004-09) :: Stuck In Endless Locking / Unlocking Door Loop Drained Battery

I got the car running again, so no need to go into details on that (I used the physical key on the keyfob, you really do have to turn it further than you'd think, but that got me into the car, after several tries was able to get it to stop cycling through the locking/unlocking and was able to jump it).

Got the 12v battery in my Prius replaced by the dealership in the last 2 years. Last winter, one day my Prius refused to start even though it had been running fine earlier that day and was parked in a semi-heated garage. Jumped it and got it working.

Last Friday I went to get out of my car and my Prius kept beeping at my any time I had the door open, and the clock on the dash seemed to be a little dim. I doubled checked that the keyfob was in my pocket (and not in the holder thingy), eventually the car seemed to lock fine and I went up to my apartment. Didn't drive the car until this morning.

This morning I come down to find that keyless entry does not work, nor does pressing the unlock button on the keyfob. (The car is parked in heated underground parking fyi.) About every 1 second on repeat, the car is making this sound like it makes when you hit the lock/unlock button from the inside of the car, so it seemed like it was stuck in an endless loop of locking or unlocking. I go back upstairs, leave my key fob in my apartment (which is around 300 meters away or so), come back down - it's still on the loop making that sound.

I get into the car with the physical door key, try starting it - the lights will come on but the car doesn't seem to actually start. And the endless lock/unlock loop starts up against once I turn the car "off". I got upstairs and switch to my other backup keyfob. Come back down. Car is still in the endless loop. Try to start it again, car still doesn't seem to start, but this time when I turn it "off" the endless lock/unlock cycle finally stops. Do finally get it running by jumping the battery, then it seems to run fine.

So I bring it to the dealer, and the guy their rather vehemently insist there must be something wrong with my keyfob. First he immediately confidently assures me that I just need to replace the battery in the keyfob, which makes no sense. Then he changes to saying he thinks the lock button on the keyfob was stuck down, which doesn't make sense either as like I said it continued doing it even when I removed any keyfob from being anywhere near the car.

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