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Fiesta going into Battery Saver Mode, 1 day after charging.

AlexRB1986
AlexRB1986
in Ford Fiesta Club

Featured Replies

Hello

My 2023 Fiesta (Titanium X mhev) has been going into Battery Saver Mode more and more frequently over the past 4 months (owned it for 6 months). I thought it was due to too many short trips (I drive 12 miles to and from work each day, but take shorter trips over the weekend to shops, golf, etc).

Usually, I take it on a longer drive (1hr) at the weekend and this clears it up. This week I have also purchased a CTEK MXS 5.0 battery charger and charged my battery to full yesterday during work. Since this charge yesterday, I have only driven home, and to and from work today.

5 minutes after getting home today I got a notification they my car had again gone into battery save mode.

Can anyone suggest what I should do? Should I have reset the Battery Management System after charging? Can I investigate the cause myself?

 

 

  • Quote


    1 hour ago, AlexRB1986 said:

    Can anyone suggest what I should do?

    Buy a new good quality battery. For example 'Yuasa'

    1 hour ago, AlexRB1986 said:

    Should I have reset the Battery Management System after charging?

    NO !!

    When you were using the battery charger, did you have the negative lead connected to the chassis earth point ?

    To be honest this does just sound like the typical failure of the battery.

    Do you have a multimeter ?

    If yes then check the battery terminal voltage about 1 hour after you have parked up and take a look at the SOC table below. Start the engine and measure the battery terminal voltage with the engine running at a fast idle. The charging voltage should be at least 13.95V but more likely 14.5V

    Ford - Battery SOC & Text.JPG

  • Quote
    • Like 3
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    • Author
    1 hour ago, unofix said:

    Buy a new good quality battery. For example 'Yuasa'

     

    When you were using the battery charger, did you have the negative lead connected to the chassis earth point ?

    Thanks for your reply.

    Yes, I connected it to the earth point illustrated in the manual.

    I'm now booked in to have a battery fitted tomorrow (by coincidence its actually a Yuasa EFB096, like you mentioned).

  • Quote
    9 hours ago, AlexRB1986 said:

    I'm now booked in to have a battery fitted tomorrow

    Then you reset BMS👍

  • Quote
    • Thanks 1

    reset bms is easy, what some places charge to do a 25minute job for is crazy, bought one on line nearly half of halfords price and top quality good if youre ok with couple of spanners,good luck

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