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MK4 key fob issues

Gazleo
Gazleo
in Ford Mondeo / Vignale Club

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Had a low key fob battery warning on dash so changed battery and everything is fine for 2 days then nothing works so have to use key and insert fob into ignition.

changed battery several times and same thing each time! 

Please help as I'm at my wits end

cheers guys

  • Quote


    What brand are the batteries that you are using? I've read that some brands don't work too well in the fobs. I use Duracell without any problems.

  • Quote
    • Author

    Hi yeah I used Duracell initially however I then changed to Panasonic with no improvement.. New batteries test at 3.1-3.2V however my fob stops working when the battery reaches 2.9-3.0V which would be normal I guess. When I say normal I mean the power in the battery..

    Its a strange one 🤔

  • Quote

    Coincidentally, last Saturday, my car started reporting back that my key fob battery is low too. I've not got a replacement yet but I've just tested the battery at 3.4V  ???  Think my multi-meter is out. 

  • Quote
    • Author

    Sounds ominous 🤔😩

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