Mystery parasitic battery drain - Page 3

GrimReaperSS · 10-02-2018, 11:22 PM

Smart Charging system....

Frisbey · 10-03-2018, 07:54 AM

An inexpensive first attempt would be to change the battery,

I had a 5th gen that did exactly what youve been experiencing,

I believe the car sat in the dealers lot and the battery discharged over time, rather than replacing it, they charged it after it sat depleated. Batteries don’t do well if they are allowed to run below a certain voltage.

I replaced it and all things were back to normal.

Might be worth a try

KingLT1 · 10-03-2018, 09:54 AM

as previously mentioned replace the battery. keep the new battery on a tender if the car will sit for a period of time without being used.

ctrlz · 10-03-2018, 10:14 AM

Quote:

Originally Posted by Frisbey

An inexpensive first attempt would be to change the battery...

I agree. I would want to try a known good battery to eliminate that as a possible source.
Pray for that to fix it. If that's not the problem, the rest of the behavior sounds like an intermittent electrical problem, and those are notoriously hard to find.

Glen e · 10-03-2018, 10:17 AM

trust me, its not the batt, its “satan in the wiring harness”, as BMW techs call it in service training.

Torquem · 10-03-2018, 10:22 AM

C6 corvettes suffer pretty bad from parasitic loss. It is the onstar system that does it on those. I removed onstar system and it cured mine.

torqueaddict · 10-03-2018, 11:12 AM

I've seen batteries do strange things. I had one go out like a switch without warning. No hard starts or anything. The engine tumbled strong the day before, and the next it was dead. I refused to believe it was battery, but it was.

Nsxmatt · 10-03-2018, 11:51 AM

Quote:

Originally Posted by Torquem

C6 corvettes suffer pretty bad from parasitic loss. It is the onstar system that does it on those. I removed onstar system and it cured mine.

I'd be willing to bet that's exactly it. They are constantly doing on board diagnosis of your car, even as little energy as that takes it still is a slow drain. Plus the OP doesn't drive it much by the mileage so it's probably killed the battery.

17rsvert · 10-03-2018, 06:19 PM

Thanks GrimReaperSS! That's a lot of information to get through.

17rsvert · 10-03-2018, 06:29 PM

Quote:

Originally Posted by Nsxmatt

... the OP doesn't drive it much by the mileage so it's probably killed the battery.

I bought the car used with 735 miles in January '18. The car had been registered by the original owner in October '17. True, I do not put a lot of miles on it, but it is unusual if it sits more than a week. God only knows how the battery was maintained before the first buyer, or at the dealership before I bought it.

Easy to say "just buy a new battery" but the one I have is still under warranty, and a new one costs over 150 bucks.

ctrlz · 10-03-2018, 09:01 PM

Quote:

Originally Posted by 17rsvert

Easy to say "just buy a new battery" but the one I have is still under warranty, and a new one costs over 150 bucks.

This is the conundrum. You are at the mercy of the dealer. My thinking is if you replace the battery at your own expense at least you can then move on to having the dealer replace modules at THEIR expense. When you start talking about things like BCM and Infotainment I bet you start near the $1000 mark.

zag · 10-04-2018, 10:36 AM

Pm sent to17rsvert.

Bayles76 · 11-30-2018, 08:50 AM

Quote:

Originally Posted by hotlap

My daily driven 16’s battery drained down completely overnight two times in less than two weeks. The second time I had them flatbed it to the dealer who said nothing was wrong. It’s now six months later and it didn’t happen again.

Mine just did this. It happened on the 19th and just happened again this morning. I will be replacing my battery this afternoon. This is now the 4th time it's happened in a year. Starting to loose hair when i drive the car paranoid it will happen again at any time.

Adrian97c · 12-25-2018, 08:52 PM

Quote:

Originally Posted by Bayles76

Mine just did this. It happened on the 19th and just happened again this morning. I will be replacing my battery this afternoon. This is now the 4th time it's happened in a year. Starting to loose hair when i drive the car paranoid it will happen again at any time.

Did the new battery fix your issues?

I had my original stock battery replaced 16months after delivery. It left me stranded. It’s now been almost 1 year & now I’m having driver window & seat memory issues & car struggles to start.

Bumper to bumper warranty is now over (44k miles), so I’m hoping replacing battery will fix me up.

10-02-2018, 11:22 PM	#29
GrimReaperSS Drives: 2001 Onyx Black/Ebony SS. 427/M6 Join Date: Apr 2016 Location: Sussex, Wi Posts: 509	Smart Charging system.... Attached Images

10-03-2018, 07:54 AM	#30
Frisbey Drives: 2018 Camaro ZL1 Nightfall Grey Join Date: Jun 2015 Location: Whidbey Island, Wa. Posts: 367	An inexpensive first attempt would be to change the battery, I had a 5th gen that did exactly what youve been experiencing, I believe the car sat in the dealers lot and the battery discharged over time, rather than replacing it, they charged it after it sat depleated. Batteries don’t do well if they are allowed to run below a certain voltage. I replaced it and all things were back to normal. Might be worth a try __________________ 1100 - 10/28/17 Ordered 1100 - 02/02/18 cancelled, Re-ordered from BeckyD 1100 - 02/02/18 \| 3400 - 02/14/18 TPW 2/19 2000 - 02/06/18 \| 4300 - 02/20/18 Built 3000 - 02/07/18 \| 5000 - 03/08/18 At Dealer 3100 - 02/09/18 \| Delivered

10-03-2018, 09:54 AM	#31
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,797	as previously mentioned replace the battery. keep the new battery on a tender if the car will sit for a period of time without being used. __________________ 2016 NFG 1SS A8 Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA

10-03-2018, 10:17 AM	#33
Glen e Retired from Car mfrs.... Drives: 2LT RS/HR-V Join Date: May 2013 Location: /Fort Lauderdale Posts: 10,048	trust me, its not the batt, its “satan in the wiring harness”, as BMW techs call it in service training. __________________ Glen CLICK HERE for detailing a new car: detailing for non detailers CLICK HERE for how to rinseless CLICK HERE for EASY wheel sealant

10-03-2018, 10:22 AM	#34
Torquem Bannable Drives: 2017 Camaro ZL1 Join Date: Oct 2009 Location: Houston, TX Posts: 460 View My Garage	C6 corvettes suffer pretty bad from parasitic loss. It is the onstar system that does it on those. I removed onstar system and it cured mine. __________________ One must forego the self to attain total spiritual creaminess, and avoid the chewy chunks of degradation 2017 ZL1 A10 - Hyper Blue Metallic Rotofab CAI, TM ported TB, AWE non res touring catback with PLP's

10-03-2018, 11:12 AM	#35
torqueaddict Drives: Tesla M3 LR-AWD [Former 1SS owner] Join Date: Jan 2018 Location: Miami Posts: 950	I've seen batteries do strange things. I had one go out like a switch without warning. No hard starts or anything. The engine tumbled strong the day before, and the next it was dead. I refused to believe it was battery, but it was.

10-03-2018, 06:19 PM	#37
17rsvert Drives: 2017 HBM 2LT RS Convertible V6 A8 Join Date: Jan 2018 Location: NJ Posts: 654	Thanks GrimReaperSS! That's a lot of information to get through.

10-04-2018, 10:36 AM	#40
zag Drives: 2018 camaro 2 ss Join Date: Feb 2018 Location: FL Posts: 51	Pm sent to17rsvert.

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