Intermittent Charging System Fault

Discussion in 'LR4' started by churious, Jul 16, 2018.

  1. WuNgUn

    WuNgUn New Member

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    Thread still active?
    I have this fault on my 13 Evoque.
    Battery (in freezing Temps) was 12.2V, at idle 13.9V....seems too high...?
    Faults been active for a week... But car starts and runs fine. . Cranks good even in sub-freezing Temps.
    Battery is an Interstate with 6 year warranty. ..
    Unsure if it's original.
    Also pulled the terminals off the posts and cleaned... Checked plug connectors Seems all good.
    Suggestions?
     
    Last edited: Jan 14, 2019 at 8:24 PM
  2. ryanjl

    ryanjl Full Access Member

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    The Interstate is not original, but it is what the dealer replaces the original battery with when the original goes out.

    I had an Interstate go out about a year ago. It was less than 2.5 years old. Got a discount on a new one. Land Rovers are hard on batteries.
     
  3. WuNgUn

    WuNgUn New Member

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    I'm wondering if mine will soon be ruined if it's constantly being charged.... 13.9V is high when I measured it. Unsure of its constantly that high....
    Maybe I'll have the shop plug into it tomorrow and pull the codes.

     
    Last edited: Jan 14, 2019 at 4:45 PM
  4. Azoo

    Azoo Full Access Member

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    Its normal for the Alternator reading to be over 14 volts while the car is running, the voltage also changes when you switch on the lights or A/c.
     
  5. WuNgUn

    WuNgUn New Member

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    Yes, checked this, and there is a short voltage drop when powering up accessories .. Then goes back to 13+.

    Again, engine off, and I'm reading 12.2V
    Apparently Google says 12.2V is a battery at 75% to 50% charged.
    So the battery isn't able to be fully charged....
    Sound plausible?
     
  6. WuNgUn

    WuNgUn New Member

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    So just dropped in a new, 800CCA AGM battery...
    Error still displays on dash. I'm assuming the new battery likely isn't 100% off the shelf and/or it might take a few drive cycles to clear the error....
    I hope!
     
  7. Azoo

    Azoo Full Access Member

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    Get a scanner and pull the codes, without knowing the codes its almost like shooting in the dark...12v to 12.6v volts is normal when the engine is off, or should i say a fully charged battery will read within that range. Not sure what you googled that said the battery is 50-75% charged. if your battery is able to start your car on a cold morning then its fully charged.
     

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