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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 01-10-2014, 09:50 PM
Point38 Point38 is offline
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e92 - Low Battery warning light even after replacing the battery.

Hi,

I've this weird thing going on with the battery on my BMW e92 2007 328i. And I get this Low Battery warning light when the engine is off or when the start button is pressed once. I've recharged the battery and after 5 mins I get this warning light anyway, battery is low. I've even replaced old battery with a new one. Still the same thing... Any ideas? Could it be the Intelligent Battery Sensor or something else?

Thanks!

Last edited by Point38; 01-10-2014 at 09:52 PM.
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  #2  
Old 01-11-2014, 01:26 PM
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SilverX3 SilverX3 is offline
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you need to register your battery

Most battery place can do this for you with a scanner

they charge about 30 min for labour (or $50 here)
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  #3  
Old 01-11-2014, 01:35 PM
Point38 Point38 is offline
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Thanks a lot SilverX3! The funny thing is that it was replaced under extended warranty. Wondering why the mechanics didn't do it...

P.S. They've replaced the original BOSCH battery with their MOPAR- BB0H7730AA (It is for 2013 Dodge Charger if it matters). And I believe it's not AGM so it can't be registered.


Quote:
Originally Posted by SilverX3 View Post
you need to register your battery

Most battery place can do this for you with a scanner

they charge about 30 min for labour (or $50 here)

Last edited by Point38; 01-11-2014 at 01:49 PM.
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  #4  
Old 01-11-2014, 01:58 PM
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SilverX3 SilverX3 is offline
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registration is simply telling the car computer that new battery has been put in... so that it won't send a low battery signal out

as long as battery has similar spec then that's it

the car computer doesn't need to know which brand of battery
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  #5  
Old 01-11-2014, 03:52 PM
Point38 Point38 is offline
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Got it, thanks!
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  #6  
Old 01-11-2014, 06:47 PM
Point38 Point38 is offline
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I've just tested the battery for voltage when the engine is off and on. And here are the results:
When it's off it shows 11.8V
When the engine is on it shows 14.4V

Seems like too low and two high to me.
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  #7  
Old 01-11-2014, 10:56 PM
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SilverX3 SilverX3 is offline
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Seem ok... 12v off is about right
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  #8  
Old 01-12-2014, 07:46 AM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by Point38 View Post
I've just tested the battery for voltage when the engine is off and on. And here are the results:
When it's off it shows 11.8V
When the engine is on it shows 14.4V

Seems like too low and two high to me.

A-yessssss.....view the videos, act accordingly.

.

Last edited by CALWATERBOY; 01-12-2014 at 07:50 AM.
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  #9  
Old 01-12-2014, 08:08 AM
ctuna ctuna is offline
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Put a charge on it and make sure it holds

Put a charge on it and make sure it holds overnight.
New does not always mean good and if it had been setting
for a long time if may have discharged.
11.8 is to low a new battery with a charge should be 12.6
Did you match the amp hours with the old battery ?
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  #10  
Old 01-12-2014, 08:53 AM
hemismith hemismith is offline
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Quote:
Originally Posted by Point38 View Post
I've just tested the battery for voltage when the engine is off and on. And here are the results:
When it's off it shows 11.8V
When the engine is on it shows 14.4V

Seems like too low and two high to me.
The 14.4 is the alternator output.
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  #11  
Old 01-12-2014, 08:54 AM
hemismith hemismith is offline
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There is also a recall on the battery connector for my car, perhaps yours too, that can cause intermittent charging and a few other symptoms. Have you signed up on BMW USA's web site? It'll tell you if there are any recalls for your car.
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  #12  
Old 01-12-2014, 09:22 AM
ptrcd003 ptrcd003 is offline
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Quote:
Originally Posted by ctuna View Post
11.8 is to low a new battery with a charge should be 12.6
Assuming he is measuring the voltage when the battery is out of the car. Unless the car goes into sleep mode, the electronics are drawing power. You need to open the hood, lock the car, and come back in 20 minutes and measure the voltage.
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  #13  
Old 01-12-2014, 02:10 PM
Point38 Point38 is offline
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I should have mentioned that I don't have any tools to measure battery voltage. I've used the service menu instead and double checked today the voltage. It shows 12.2 with daylights on. And it's like 1 day old battery which was replaced by Autonation.com but it's not AGM battery. So I think I need to get AGM instead and do it the proper way. But one thing I don't understand. The old battery was Bosch 94R-730B which is not AGM and I believe it is there since the first day. But why would they put non-AGM battery when there is IBS?

@hemismith: just checked and there was no recall for my car.

Last edited by Point38; 01-12-2014 at 02:11 PM.
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  #14  
Old 01-12-2014, 02:19 PM
ptrcd003 ptrcd003 is offline
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Quote:
Originally Posted by Point38 View Post
The old battery was Bosch 94R-730B which is not AGM and I believe it is there since the first day. But why would they put non-AGM battery when there is IBS?.
You can use either battery, you just have to tell the car which type is installed. AGM or non-AGM will both work.
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  #15  
Old 01-12-2014, 02:29 PM
Point38 Point38 is offline
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Quote:
Originally Posted by ptrcd003 View Post
You can use either battery, you just have to tell the car which type is installed. AGM or non-AGM will both work.
And is there an easy way to do that? Besides DIS?
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  #16  
Old 01-12-2014, 02:32 PM
ptrcd003 ptrcd003 is offline
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Quote:
Originally Posted by Point38 View Post
And is there an easy way to do that? Besides DIS?
Nope.
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  #17  
Old 01-12-2014, 05:32 PM
ctuna ctuna is offline
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Inpa is the cheapest way to do it.(register battery)

Inpa is the cheapest way to do it.
There are several ways to do it .
Go to the coding boards to find out about it.
Or Go to an Indy with auto logic.
Use a Bav Tool.
Coding cable with Inpa .
If you have to reprogram NCSexpert with coding cable.
14.4 Volts is about right for battery charging.
If they gave you a proper substitute battery and its good
you shouldn't have a problem , there is no reason to change battery types.
Registration only effects charging over
the long term.
You can get a voltmeter at radio shack for about 20 bucks or you could
get and elm bluetooth 327 module and the torque app to monitor the voltage.

Last edited by ctuna; 01-12-2014 at 05:33 PM.
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  #18  
Old 01-12-2014, 06:57 PM
Point38 Point38 is offline
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Thanks for advise! I've used INPA for my e38. But when I've tried to use it on e92 everything is in German. Will need to find eng config file somewhere.

Quote:
Originally Posted by ctuna View Post
Inpa is the cheapest way to do it.
There are several ways to do it .
Go to the coding boards to find out about it.
Or Go to an Indy with auto logic.
Use a Bav Tool.
Coding cable with Inpa .
If you have to reprogram NCSexpert with coding cable.
14.4 Volts is about right for battery charging.
If they gave you a proper substitute battery and its good
you shouldn't have a problem , there is no reason to change battery types.
Registration only effects charging over
the long term.
You can get a voltmeter at radio shack for about 20 bucks or you could
get and elm bluetooth 327 module and the torque app to monitor the voltage.
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  #19  
Old 01-12-2014, 08:35 PM
ctuna ctuna is offline
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The procedures are well documented here.

http://www.e90post.com/forums/forumdisplay.php?f=368

http://www.e90post.com/forums/showthread.php?t=532315

inpa or ncsexpert procedure in the above link.

plus there is a reprogramming thread in the first link if you search for it.

If you have a 325 or 330 you have to use msv70 or something 70 for the
engine software for the ncsexpert procedure.

Last edited by ctuna; 01-12-2014 at 08:50 PM.
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  #20  
Old 01-12-2014, 08:40 PM
ptrcd003 ptrcd003 is offline
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Quote:
Originally Posted by ctuna View Post
Use a Bav Tool.
From what I recall, the Bav tool could only re-initialize a replacement battery, not code in a new battery with different specs. Is this now a supported function?
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  #21  
Old 01-12-2014, 10:23 PM
ctuna ctuna is offline
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Bav Tool only registers Yep.

Bav Tool only registers Yep.
You need a coding setup to reprogram.
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  #22  
Old 01-15-2014, 04:28 PM
RBinDC RBinDC is offline
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Quote:
Originally Posted by hemismith View Post
There is also a recall on the battery connector for my car, perhaps yours too, that can cause intermittent charging and a few other symptoms. Have you signed up on BMW USA's web site? It'll tell you if there are any recalls for your car.
Aha!

I had a low battery warning icon come on last year and couldn't get the battery to charge up with a battery tender. When the recall letter came I took the car in and mentioned the battery problem. The dealership replaced my battery under the warrantee as a courtesy, claiming the the problem was that I had my iPhone charger plugged into the lighter socket and that was causing the computer to not fully shut down the system.

I appreciated the replacing the battery but now I wonder if the battery connector caused the problem.
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  #23  
Old 01-16-2014, 05:06 AM
Dubfound Dubfound is offline
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I had a light pop up on the dash and I thought it was the low battery light and it was actually the low coolest light. It he low coolest light looks like a low battery indicator. I have actually never seen what the low battery light looks like. Hhaha
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