Prius (2004-09) :: MDF Indicates A Rapid Discharge, Battery Shows One Bar
2006 Prius with 130k miles. I'm thinking that my HV battery has slowly deteriorated to the point where it's causing drivability issues, and now needs to be replaced.
The main symptoms I'm experiencing are rapid charge/discharge according to the MFD and significant loss of power once the battery has discharged to one bar. I realize the latter is "normal," but the problem is that I'm seeing one bar frequently now. Hill climbs that my car used to do with no problem and would drain the SOC to 2-3 bars now cause the battery to drain to 1 bar about half-way up and then loss of speed from 65 mph to 45 mph by the time I reach the top. Descending hills, it's not unusual to see the SOC go from 2 bars to 7-8 bars within 30 seconds or so.
I'm not seeing any error lights, and my (cheap) code reader does not report any logged DTCs.
This seems to be a slow degradation of battery performance, rather than an outright failure. I first noticed that the battery would charge/discharge a little quicker than it had been at about 90k miles. At 99k (before the warranty ended) I took it into the dealer and they tested the HV battery. Block voltages ranged from 16.59 to 16.68 V and resistances ranged from 0.025 to 0.026 ohms. Based on this, they said that the battery was fine, and sent me on my way. Since then, the problem has just gotten worse and worse, though.
Prius (2004-09) :: Full Battery Discharge In 1 Hour - Car Was Off
About 20 minutes ago I started up the car and the screen indicated the main battery was pretty much empty. And hour before I had pulled into my driveway and the battery had indicated maybe 70%+. The car was off, nothing like headlights or anything I know of was left on.
View 19 RepliesPrius (2004-09) :: 2005 - Battery Not Working - Dying Repeatedly At 120,000 Miles
Trying to figure out whether to fix or scrap our 2005 Prius with 193,000 miles and a mysterious 12V battery problem. What would you do in my situation?
We've had a recurring problem with the 12V accessory battery: I have replaced it myself three times. The last failure was the most mysterious, because after replacing the 12V battery for the third time, I conducted nearly daily voltage tests using the Prius' "secret" vehicle signal check. Voltage coming off of the 12V was normal, if not high the entire time in all of the Prius's various starting and ready modes. I wired up a solar panel to trickle-charge the 12V battery when we weren't around, and we plugged the 12V in at night to a trickle charger to keep the battery topped up.
Nonetheless the day came a few months after the latest replacement when we had our usual 12V failure symptoms: the time on the clock started resetting, the car didn't turn on on the first press, the Prius computer rebooted, and eventually the car wouldn't start without a jump start. This has been super-frustrating, and googling around, I haven't been impressed by people's reported experiences trying to have the dealer try to resolve such problems. My worry is that a dealer repair person will change the accessory 12V battery without fixing the underlying problem. I would suspect a parasitic draw somewhere, but voltage tests when the car was overnighted without any kind of charging did not suggest a serious voltage draw on the 12V battery.
Other details about the car: our keyless entry hasn't worked for several years (dead batteries in the key fob?) and we open the car manually using the key each time. We stick the fob in the slot each time we want to start it. MPG is comparatively low vs. other Priuses, perhaps 44-45 MPG, and lower when the 12V battery starts to die (37-40). I have had the car serviced (oil, etc.) like clockwork every three months; recently, I've noticed the engine is starting to burn oil a bit (level is reported low on each change).
Most of the driving has been done in the flats and the heat of California's Central Valley, and we've put something like 120,000 miles on it just in the last five years. Besides the fact that the 12V battery keeps dying, the car has been very reliable.
We just inherited a free Prius with just 60,000 miles on it, and I have a 1993 Camry with 150k miles on the chassis and maybe 60k miles on the replacement engine I had dropped into it a few years ago. The Camry just passed California's smog test and seems to be running well. We don't want or need three cars.
Our choice is to try to fix the Prius with 193k miles on it and donate the Camry (which gets about 20 miles to the gallon, the horror...), or keep the Camry and donate the Prius. My instinct is to not drop thousands of dollars into the high-mileage Prius, especially if these issues might be pointing to a dying main battery.
Prius (2004-09) :: HV Battery Drop Discharge Level Running On ICE Only With Slow Acceleration
I have a 2005 with 165K on it. Just within the last 2 weeks, at start up, no matter what level the charge shows on the display, the HV battery will almost fully discharge and then come back up to full charge within a mile of driving. I just replaced the 12V battery thinking this could have been an issue, but it didn't change anything. The car never acted like this since I bought it in 05. When it drops to the discharge level, It running on ICE only, with the typical slower acceleration. What could be going on?
View 8 RepliesPrius (2004-09) :: 2005 - Hybrid Battery Warning Lights Come On
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.
View 11 RepliesPrius (2004-09) :: 2005 - After Disconnecting Hybrid Battery Won't Start?
My 2005 prius will not start. We had some body work done to it after a deer ran into me. They did a small amount of welding and had disconnected both batteries. Now the car will not start. It can be put in auxiliary mode but if you try to start it with your foot on the brake, it flashes some lights for a few seconds and then goes dead. Is the hybrid battery too low to start the car? It was pretty low. before the batteries were disconnected. Or did they possibly do something wrong when they disconnected the hybrid battery? Final question would be do they have to do some reprogramming after disconnecting the hybrid battery?
View 11 RepliesPrius (2004-09) :: 2005 - Fuse Blown While Replacing Hybrid Battery
I replaced the hybrid battery in my 2005 Prius today & when I disconnected the 12v battery the wrench arced & I assume that I blew a fuse. I have looked, but have not found anything. I hope I am missing something obvious.
View 5 RepliesPrius (2004-09) :: 2005 / 132k - Engine Dipstick Reading At End Tip / Massive Oil Leak
The car was low and I added enough oil to bring back to full. 1800 miles later, engine dipstick reading at end tip of dipstick. Added a quart, was full. Drove around 80 miles. It was low again. It has a huge film of oil spray all over the back end and it seems to be leaking a lot of oil. It's in a kind of square patterning the driveway. Not just one drip. This is my first Prius.
2005 Prius Package 3 132k
Prius (Gen 3) :: From A Cold Start, Rapid Discharge From The Battery
Very occasionally and usually from a cold start I get a rapid discharge of the battery.
View 7 RepliesPrius (2010-12) :: Battery Discharge By Headlights When Vehicle Stopped
This evening, long after sundown, I found myself stuck on an unmoving expressway with no sign of traffic starting up again (the radio reported a vehicle fire ahead, all lanes blocked). Time dragged on, and I started worrying about the possibility of the headlights draining the 12V battery , assuming that they do indeed run off the 12V battery. In a conventional car this wouldn't have been a problem because the idling engine would have maintained enough battery charge, but of course here the ICE wasn't running. So I turned off the power button to shut down the lights (it's a Canadian car, so there's no way of turning off the headlights with the power button on). That was safe in this particular situation because there were plenty of stopped vehicles behind me. It definitely would not have been safe if mine had been the last vehicle in the lineup.
View 7 RepliesPrius (Gen 2) Fuel :: 2005 - Expected Mpg With Bad Hybrid Battery?
A friend of mine has a 2005 Prius, and was asking what his mileage would be when the hybrid battery dies. He has about 131k miles on it, and the battery dies out very quick right now. I told him that with a 1.5L engine, he should get at least 40mpg with the hybrid battery being dead.
View 19 RepliesPrius (Gen 2) :: 2005 Hybrid Battery Installed, Engine Code 2102 / Bars Dropped
I just bought 05 prius from a dealer I don't know the history was told all it needed was a hybrid battery.
Now I have a 05 that I drive with known good parts so I pulled my hybrid battery and installed it in the new car the monitor showed engine charging inverter then going to the battery. However the bars on the battery graph start dropping. only code is a engine code 2102.
I also noticed the old A/C condenser in the back.
Prius (2004-09) :: 2007 With 45K Miles - Failing HV Battery?
The battery gauge on my 2007 seems to be dropping much faster than it used to. I can back out of my driveway with full green, and be down to purple in two miles of <45MPH driving. It also seems to recharge faster, as if the 'window' of usable charge has become much narrower.
I took it in for the 45K service, and asked the dealer to investigate. The tech wrote that everything is fine, and that this behavior is normal because "this is deep cycle battery".
Two questions: If the main battery fails completely, will the car still be driveable or will I be stranded at that point?
The little 12V battery is still the original that came with the car. Could it cause the above symptoms?
Prius (2004-09) :: Battery Drains In Couple Of Miles
I'm new to this technology. I bought 2008 t spirit prius . The battery drains in couple of miles. I don't know what to check .
View 5 RepliesPrius (2004-09) :: Battery Cooling Fan Comes On 1st Time In 56,000 Miles?
First time I've ever noticed it at least. And she's been on 2 huge x-country road trips with much hotter temps than the other day.
View 8 RepliesPrius (2004-09) :: 2007 - Hybrid Battery Always At One Bar Down?
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.
View 6 RepliesPrius (2004-09) :: Hybrid Battery Is Low Overnight
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?
View 18 RepliesPrius (2004-09) :: Possible To Charge Hybrid Battery When Car Is Idling
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?
View 6 RepliesPrius (2004-09) :: Red Triangle / CEL And Red Car At The Top Of MFD - Hybrid Battery Failing
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.
View 19 Replies