Check Engine code U1118???

MikeeM3 · 02-18-2015, 09:31 AM

Hi guys,

For the first time since i own my M3 i had a check engine light that came on last sunday night. It was damn cold here in ottawa, canada (-35F).

Car was running rough and i have scanned the code on the next morning and it was U1118 !! From my research its something between the signal from a computer to the other or something like this. Can it also be something else???

It was fine all day monday and last night i went and start the car after work and the damn code went on again, and yes it was still the U1118.

Im looking to see if some of you guys have experience this before and what was the outcome???

Thanks
Mike

Amirsm3 · 02-18-2015, 09:36 AM

Are you on the original factory battery still? It might be time to swap. Try charing it with a trickle charger before you replace it, though. It's hard to diagnose electrical gremlins

Sorry I can't be of more help.

///M Power-Belgium · 02-18-2015, 10:13 AM

-35°F that's "-37° Celsius" ... Holy 5H1T !
Mike ,your balls must freezing off out there...So personal I think your battery has a hard time to keep up !
So as stated above just connect a good battery tender and let it sit overnight ...

MikeeM3 · 02-18-2015, 10:32 AM

Quote:

Originally Posted by Amirsm3

Are you on the original factory battery still? It might be time to swap. Try charing it with a trickle charger before you replace it, though. It's hard to diagnose electrical gremlins

Sorry I can't be of more help.

Yes car is still under the original battery !! Car has 70k so ill see if i still have the same issue when temperature gets a little warmer !! Thanks for the help

MikeeM3 · 02-18-2015, 10:36 AM

Quote:

Originally Posted by ///M Power-Belgium

-35°F that's "-37° Celsius" ... Holy 5H1T !
Mike ,your balls must freezing off out there...So personal I think your battery has a hard time to keep up !
So as stated above just connect a good battery tender and let it sit overnight ...

Yes its a damn rough winter this year for us !! It was -40c past saturday night !!! Both previous owners of the car had heated garage so i guess its something new for my baby to deal with cold temperature like this haha

Bavarian Beast · 02-18-2015, 10:58 AM

An ///M without a garage? I'm surprised BMW hasn't come and taken it back! Good luck with your issues and (attempt to) stay warm.

MikeeM3 · 02-23-2015, 07:30 AM

Code U1118 came back on about 3 times since ive made this post... car always starts fine do i really need to buy another battery?

Patrón · 02-23-2015, 08:49 AM

Quote:

Originally Posted by MikeeM3

Code U1118 came back on about 3 times since ive made this post... car always starts fine do i really need to buy another battery?

i'ts just a battery, change it before it leaves you stranded somewhere.

M3AG · 02-23-2015, 09:58 AM

Quote:

Originally Posted by Patrón

i'ts just a battery, change it before it leaves you stranded somewhere.

+1

My E90 (323i, my winter beater) had some issues due to extreme cold. Rear window defroster & heater stopped working due to weak battery. Is battery covered under warranty?

Yoddha · 02-23-2015, 10:07 AM

Quote:

Originally Posted by MikeeM3

Code U1118 came back on about 3 times since ive made this post... car always starts fine do i really need to buy another battery?

I'd suggest leaving the car on a battery tender before you decide to shell out the cash to replace it. Also if you take your car to a BMW dealership or a certified BMW garage, you can have them scan your battery to see how it's life and performance is doing. Way better options than replacing the battery if It isn't needed.

wifesbimmer · 02-23-2015, 02:27 PM

buy a battery tender from Canadian Tire. It's about $40, a lot cheaper than a new battery. I live in Alberta where it's constantly -40 throughout the winter which can be 6 months long at a time. I always have my m3 hooked up to Battery tender. No problem yet!

Zertag01 · 11-15-2018, 09:52 AM

Hello MikeeM3

I also just got on my 2011 M3 coupe E92 check engine light code U1118 and code U1118P it's cold here in Washington DC also

Just want to know if you was able to resolve the error code U1118 on your M3, I read some people say it's a battery replacement, just want know before I spend $400.00 on a new battery.

Thanks

Zertag01 · 12-12-2018, 09:53 AM

Check Engine code U1118???
I replace the battery 90Ah 900 C Crank, No more error codes on the 2011 BMW M3 coupe, any one that get's the error message just replace the battery

InnerBlueSkies · 01-07-2019, 03:17 AM

Battery

randrews15 · 01-07-2019, 05:38 AM

When I had a BMW motorcycle they recommend that you put it on a battery tender when you're not riding it so the battery charges fully. I've done that will all my cars and I haven't had to replace the battery in any of them, and my M has had the same battery for 5 years. Just keep them charged up whenever possible, it will extend the life of the battery.

02-18-2015, 09:31 AM	#1
MikeeM3 Lieutenant Colonel 222 Rep 1,632 Posts Drives: 600whp M4 Join Date: Feb 2015 Location: Ottawa iTrader: (0)	Check Engine code U1118??? Hi guys, For the first time since i own my M3 i had a check engine light that came on last sunday night. It was damn cold here in ottawa, canada (-35F). Car was running rough and i have scanned the code on the next morning and it was U1118 !! From my research its something between the signal from a computer to the other or something like this. Can it also be something else??? It was fine all day monday and last night i went and start the car after work and the damn code went on again, and yes it was still the U1118. Im looking to see if some of you guys have experience this before and what was the outcome??? Thanks Mike
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02-18-2015, 09:36 AM	#2
Amirsm3 Brigadier General 514 Rep 3,482 Posts Drives: 2011 Space Grey e90 M3 Join Date: Feb 2014 Location: Williams/Flagstaff, AZ iTrader: (3)	Are you on the original factory battery still? It might be time to swap. Try charing it with a trickle charger before you replace it, though. It's hard to diagnose electrical gremlins Sorry I can't be of more help. __________________ 2011 e90 M3 Space Grey DCT ZCP- eAs, BMW Performance, Agency Power, Macht Schnell, iND, Milltek, Volk, Challenge, Stoptech, Ohlins BMWCCA:518970
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02-18-2015, 10:13 AM	#3
///M Power-Belgium General 63226 Rep 24,651 Posts Drives: ///M3-E92-DCT Silverstone II Join Date: Jul 2012 Location: Belgium iTrader: (0)	-35°F that's "-37° Celsius" ... Holy 5H1T ! Mike ,your balls must freezing off out there...So personal I think your battery has a hard time to keep up ! So as stated above just connect a good battery tender and let it sit overnight ... __________________ "MAX VERSTAPPEN" IS THE 2021+2022+2023 F1 WORLD CHAMPION - #UnLeashTheLion BPM DEV-Tune & DCT Software-Tune & Servotronic & coding ///Alpine HID Angeleyes ///Oem.exhaust mod.
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02-18-2015, 10:58 AM	#6
Bavarian Beast Too many wagons on the bahn..... 98 Rep 582 Posts Drives: LMB 2011 BMW e93 Join Date: Feb 2013 Location: Hawaii iTrader: (1)	An ///M without a garage? I'm surprised BMW hasn't come and taken it back! Good luck with your issues and (attempt to) stay warm.
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02-23-2015, 07:30 AM	#7
MikeeM3 Lieutenant Colonel 222 Rep 1,632 Posts Drives: 600whp M4 Join Date: Feb 2015 Location: Ottawa iTrader: (0)	Code U1118 came back on about 3 times since ive made this post... car always starts fine do i really need to buy another battery?
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02-23-2015, 02:27 PM	#11
wifesbimmer Lieutenant 158 Rep 540 Posts Drives: '20 X5 M50i, E92 M3, '16 F150 Join Date: May 2013 Location: Alberta iTrader: (0)	buy a battery tender from Canadian Tire. It's about $40, a lot cheaper than a new battery. I live in Alberta where it's constantly -40 throughout the winter which can be 6 months long at a time. I always have my m3 hooked up to Battery tender. No problem yet!
	Appreciate 0 Quote

11-15-2018, 09:52 AM	#12
Zertag01 Private 0 Rep 52 Posts Drives: 2011 BMW M3 Join Date: May 2016 Location: Washington DC iTrader: (0)	Error code U1118 Hello MikeeM3 I also just got on my 2011 M3 coupe E92 check engine light code U1118 and code U1118P it's cold here in Washington DC also Just want to know if you was able to resolve the error code U1118 on your M3, I read some people say it's a battery replacement, just want know before I spend $400.00 on a new battery. Thanks
	Appreciate 0 Quote

12-12-2018, 09:53 AM	#13
Zertag01 Private 0 Rep 52 Posts Drives: 2011 BMW M3 Join Date: May 2016 Location: Washington DC iTrader: (0)	Check Engine code U1118??? Check Engine code U1118??? I replace the battery 90Ah 900 C Crank, No more error codes on the 2011 BMW M3 coupe, any one that get's the error message just replace the battery
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01-07-2019, 03:17 AM	#14
InnerBlueSkies Captain 1093 Rep 950 Posts Drives: 2008 E90 M3 Join Date: Sep 2014 Location: College Station, Texas iTrader: (1)	Battery
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01-07-2019, 05:38 AM	#15
randrews15 Lieutenant 289 Rep 553 Posts Drives: 2012 E93 M3 Le Mans Blue Join Date: Nov 2012 Location: Parrish, FL iTrader: (1)	When I had a BMW motorcycle they recommend that you put it on a battery tender when you're not riding it so the battery charges fully. I've done that will all my cars and I haven't had to replace the battery in any of them, and my M has had the same battery for 5 years. Just keep them charged up whenever possible, it will extend the life of the battery.
	Appreciate 0 Quote