812 Issues with electronic keyless system or battery | FerrariChat
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812 Issues with electronic keyless system or battery

Discussion in 'F12/812' started by Rolfi, Aug 8, 2024.

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  1. Rolfi

    Rolfi Rookie

    Jul 8, 2024
    1
    Stuttgart, Germany
    Full Name:
    Rolf Heiler
    #1 Rolfi, Aug 8, 2024
    The vehicle is relatively often in a reduced mode after starting. Then I can only drive in WET mode and many errors appear in the display. Sometimes it is enough for me to switch off the engine and leave the vehicle. Then I open the vehicle again with the radio key and after starting the engine all error messages are gone. I cannot systematically trace the error. But it mainly happens when I have opened the bonnet after switching off the engine, or if I have used the lift beforehand. But this may just be a coincidence and not the cause.

    Is the problem known?
     
  2. Ngcanada

    Ngcanada Formula Junior

    May 16, 2016
    770
    Ottawa Canada
    #2 Ngcanada, Aug 8, 2024
    I am almost certain that it’s the battery. Get it replaced. The slightest drop in voltage will cause all sorts of gremlins.


    Sent from my iPhone using Tapatalk
     
    DZ-96 likes this.
  3. Pwillemse78

    Pwillemse78 Karting

    May 19, 2024
    154
    Valkenswaard
    Full Name:
    Peter Willemse
    #3 Pwillemse78, Aug 9, 2024
    Once you turn on the car with the key, do ensure to wait till most lights are off before starting the engine.
     
  4. Mondo3025

    Mondo3025 Karting
    BANNED

    Jul 10, 2024
    97
    Full Name:
    Mondo Asiri
    #4 Mondo3025, Sep 7, 2024
    it’s the battery typically causing electric issues
     
  5. Ngcanada

    Ngcanada Formula Junior

    May 16, 2016
    770
    Ottawa Canada
    #5 Ngcanada, Sep 8, 2024
    Ironically, this happened to me a month ago.....had the OEM garbage battery changed to the Interstate MTX-94R/H7....gremlins gone
     
    V12 GTS, Mondo3025 and Xrayv8 like this.
  6. Mondo3025

    Mondo3025 Karting
    BANNED

    Jul 10, 2024
    97
    Full Name:
    Mondo Asiri
    #6 Mondo3025, Sep 8, 2024
    exactly
     
    V12 GTS likes this.
  7. V12 GTS

    V12 GTS Karting

    Dec 9, 2023
    50
    Miami
    Full Name:
    Frank Spellman, MD
    #7 V12 GTS, Oct 5, 2025 at 4:17 AM
    I had similar electrical issues despite fact that 812 GTS had been on on factory battery tender for several months. IT REMAINS under its new car 3 year warranty. Dealer confirmed that battery would not hold charge and replaced the $1600- OEM battery at no charge to me. I was told by my excellent service advisor that battery would not have been replaced under supplemental extended warranty. If I later switch to interstate battery while under extended warranty, would this battery void other warranty coverage??
     
  8. Ngcanada

    Ngcanada Formula Junior

    May 16, 2016
    770
    Ottawa Canada
    #8 Ngcanada, Oct 5, 2025 at 7:08 AM
    The dealer also sells and installs the Interstate battery, so you're good. This will not void any warranty whatsoever. And, btw, with the extended warranty, my battery has been replaced a few times.
     

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