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      02-14-2020, 11:06 AM   #1
Shiberu
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2011 E92 start up issue

Hey everyone,

Hoping someone can help me diagnose this issue I'm having.

Tried starting the car this morning and it starts up for 1-2 seconds and then shuts off immediately. Car has almost 79k miles, auto. I just changed the grounding cable last week and the car was working beautifully until this morning. Battery was changed sometime in 2016 along with spark plugs. Car has had a history of cold start issue but that was addressed by a dealer patch in 2015. Temp this morning was 25 degrees F if that morning, since buying the car it has not been this cold.

Any ideas? Would like some input before I tow the car. Youtube video of the issue here Thanks!
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      02-14-2020, 11:47 AM   #2
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Without doing any basic diag, it hard to say.. It could be fuel related issue, DME software,mechanical issues. etc I would start with running a short test on vehicle to see if any faults are stored to look at first
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      02-14-2020, 12:40 PM   #3
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I have this issue where car will start and stop when cold.. Usually below 10F.. It will stay running about the fifth time starting.. It only does this when its cold.. I found going to 0w oil helps, I was running 5w.. Not sure if this your issue but once warmed up no issues..

Question about the video.. Is the starter being held down? It seems as soon as it stops the starter engaged?
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      02-14-2020, 12:54 PM   #4
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Quote:
Originally Posted by TunafishE93 View Post
I have this issue where car will start and stop when cold.. Usually below 10F.. It will stay running about the fifth time starting.. It only does this when its cold.. I found going to 0w oil helps, I was running 5w.. Not sure if this your issue but once warmed up no issues..

Question about the video.. Is the starter being held down? It seems as soon as it stops the starter engaged?
The starter was held down until the engine was turning over but it was not pushed down when it sputtered. I tried 3-4x's. I wasn't sure if I should've kept trying. I am hoping it is cold related and not a mechanical issue.
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      02-14-2020, 12:55 PM   #5
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In the good ole days a mechanic could listen to a car and pin point what's wrong with it. But with advent of technology we need computers to run diagnostics for us. Being able to read codes is the new mechanics ear, get with the diagnostic program, or trade that BMW for a 1970 Chevy NOVA.
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      02-14-2020, 02:26 PM   #6
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Quote:
Originally Posted by TunafishE93 View Post
I have this issue where car will start and stop when cold.. Usually below 10F.. It will stay running about the fifth time starting.. It only does this when its cold.. I found going to 0w oil helps, I was running 5w.. Not sure if this your issue but once warmed up no issues..

Question about the video.. Is the starter being held down? It seems as soon as it stops the starter engaged?
So I kept restarting the car and this time I held down the starter longer. On the 5th try the car started up!! I drove it around and then turned it off, immediately starting it up again when the engine was warmed up and it was fine. The most bizarre thing but probably weather related I'm guessing? The car is running 0w-40. Will be buying a code reader in the future if it comes up again.

Thank you so much!!!

Last edited by Shiberu; 02-14-2020 at 02:32 PM..
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      02-14-2020, 03:11 PM   #7
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Yeah I don't drive the BMW below 10f just to avoid this issue.. It still a good idea to check the codes... I am not sure if there something wrong with our cars but I have no issue above 20F (20 to 10F is hit or miss). Anyways glad your back rolling..
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      02-14-2020, 09:58 PM   #8
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Yeah, it shouldn’t act like that. Need to have the usual suspects looked at; battery, ground cables and starter is where I’d start.

Happy V day boys, muah!
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      02-15-2020, 02:01 PM   #9
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Update: car isn't starting again this morning. It has been in the garage overnight, so now I'm thinking cold isn't a factor. Code reader is coming in this afternoon.
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      02-15-2020, 03:49 PM   #10
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Codes read while key in ignition:

A0C1 CAS Output, terminal 50
A0C2 CAS Output, terminal 50 RS
3876 Power management, central undervoltage

When the car had the same issue in 2015, the battery was charged at the dealer and software update SIB 12 09 12 applied. Any new software updates that could solve this issue? Or it could be as easy as charging/ replacing battery.
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      02-15-2020, 04:05 PM   #11
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I would meter battery voltage not running and go from there.. If you have AGM battery low in below 12.7V, if so a charge will do..
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