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Electrical Issues?

Discussion in 'E90/E92/E93 M3 (2008-2013)' started by sctripp, Feb 25, 2013.

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    sctripp

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    Recently I have had a couple issues crop up on my 08 M3.
    The clock started losing about a minute every 2 days and the information screen between the speedo and tach resets itself to not displaying anything after the ignition is turned off. It will still cycle between displays, but always resets itself while sitting overnight.
    Could this be caused by a weak battery? There is no other indication the battery is weak (starts right up).
    Has anyone else experienced this problem and know the fix?
    Stan
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    steven s

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    Originally battery?
    Might be a bad battery.

    On our Mini the Nav wouldn't go on right away. We pretty much ignored it.
    Car started fine.
    I read on the internet that it's a weak battery.
    You know they can't put on the internet unless it's true.

    Well the battery died a month later probably due to a faulty electric power steering pump.
    I replaced the battery and the Nav powered right up.

    I think 5 years is about as long as batteries last these days.
    Is the car outside in the cold?
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    sctripp

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    Steve,
    The car sits inside at night and in Houston it is rarely below 35F.
    I'll start looking into a new battery.
    Thanks,
    Stan
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    • Technical Service Advisor

    charlson89

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    Steve is correct the car probably has a weak battery. Your vehicle has a energy management system that will shut down less needed items as the battery voltage get lower in order to make sure the vehicle has enough power to start the car next time. If you are going to replace the battery make sure you get the new battery registered to the vehicle or it will cut your new batteries life in half.
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    A0s4957

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    Here is an electrical issue that i need help with, my service engine light has come on and after reviewing the codes this is what i got. Let me know if you can help!
    Thanks

    04/04/12 2B4C – Intake air temp fault plus sensor plausibility (LEAN code).
    03/08/13 2737 – Change plausibility, cold start B1.
    2737 – Change plausibility, cold start B2.
    2B3B – Misfire #7.
    04/10/13 27BB – Fuel system lamda/charge plausibility B2
    27BA – Fuel system lamda/charge plausibility B1
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    steven s

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    What car? E90 M3?
    I'll move your post to its own thread.
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    • Technical Service Advisor

    charlson89

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    How did you read your faults out of the vehicle/ with what type of reader? Do you have and mods on the vehicle?

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