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| This is a discussion on Do I need a new 12v Battery? within the Gen II Prius Care, Maintenance and Troubleshooting forums, part of the Gen II (2004-2009) Toyota Prius Forums category; I had an oil change and inspection done at a local (Toyota trained) garage and since then it has acted ... |
Do I need a new 12v Battery?
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| | #1 |
| Member Join Date: Jan 2004 Location: Newt Hampshire
Posts: 74
My Car: 2004 Prius Model: Package: #9 Thanks: 0
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Friends: 0 | I had an oil change and inspection done at a local (Toyota trained) garage and since then it has acted strange. Not sure exactly but it seems the red key blinks more before it is started and the car beeps as soon as I open the door but before anything is started. Around the same time I noticed that closing all the windows at once really slowed the motors down (engine off). Also I get the red bang-triangle ("of death") for a second when I start but then it goes out and the car is fine. I didn't use the car this weekend (the best gas mileage is using a bike and not gas at all...) and the car wouldn't start. I got the dashboard fireworks and that was about it. I put the charger on the car and it started fine. The gas gauge was one bar for a few minutes until it noticed the full tank of gas again. So it appears the battery is bad and this is an 04 so maybe it is used up? The only reason I want to question it is if there is something that could be "on" or set that is draining the battery and not just a weak battery. As far as I can see all the lights are off. Anything else? jv
__________________ 2004 White #9 Founder: Hells Amperes |
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| | #2 |
| Senior Member Join Date: Mar 2006 Location: Northern Michigan
Posts: 10,486
My Car: 2006 Prius Model: Package: #7 Thanks: 95
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Friends: 10 | It sure sounds like it's time for a new battery. Tom |
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| | #3 |
| Member Join Date: Jan 2008 Location: Ballamer, Merlin
Posts: 1,523
My Car: 2008 Prius Model: Package: #6 Touring Thanks: 96
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Friends: 2 | The weirdishness you're seeing has preceded 12V battery failure for a number of folks posting here. This coupled with the frequent recommendation that the OEM 12V battery be replaced every 4 years strongly suggests that it's time for a new battery. |
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| | #4 |
| Troll Slayer Join Date: Nov 2003 Location: Nixa, MO
Posts: 17,247
My Car: 2004 Prius Model: Package: #9 Thanks: 50
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Friends: 37 | +1 to both above |
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| | #5 |
| Member Join Date: Jan 2004 Location: Newt Hampshire
Posts: 74
My Car: 2004 Prius Model: Package: #9 Thanks: 0
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Friends: 0 | Great, that sells it for me. Now to call for some quotes and do the buy/make decision if I do it or have a mechanic. If I do it I can try to keep my memory and settings intact. If they do it they own the problem if they f' it up. Thanks. |
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| | #6 |
| Senior Citizen Join Date: Jul 2005 Location: SE Pennsylvania
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My Car: 2009 Prius Model: Package: #5 Thanks: 0
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Friends: 0 | Once the 12v battery is disconnected you will lose your settings, such as radio presets, AC/Heat settings, etc. It's no big deal to reset them. Just make sure you install the proper battery with correct venting. |
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| | #7 |
| Senior Member Join Date: Feb 2007 Location: san jose, ca
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Friends: 1 | rigor's canned reply ---------------------- the batteries with the correct venting are going to cost $140 or something?? or more? before spending that money, how about removing the battery and taking it down to your local dealership or automotive store just to have tested and get a print out. this is free |
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| | #8 |
| Troll Slayer Join Date: Nov 2003 Location: Nixa, MO
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My Car: 2004 Prius Model: Package: #9 Thanks: 50
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Friends: 37 | If you connect a 12v source to the terminals under the hood during the change you can preserve all your settings. For some of us it's a little bit of a big deal b/c we're lazy! |
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| | #9 | |
| Troll Slayer Join Date: Nov 2003 Location: Nixa, MO
Posts: 17,247
My Car: 2004 Prius Model: Package: #9 Thanks: 50
Thanked 260 Times in 156 Posts
Friends: 37 | Quote:
For my money I'd just cut bait now knowing I had another 4-5 years in my new battery and not have to worry about the old one dying unexpectedly.
__________________ Evan E. Fusco, MD "It's a damn poor mind that can only think of one way to spell a word." -Andrew Jackson ![]() ![]() | |
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| 12v battery, triangle |
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