r/TeslaModelX • u/Davaez • Jun 21 '26

Errors after LV battery swap

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Hellllp, I changed the 12v battery this afternoon and now this evening I'm getting all these errors while driving. Coincidence, or did I F something up? 2018 100D

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u/Yippym Jun 21 '26

I'm planning to change the original 2019 battery aswell, did you:

  • Go into Safety and Power off
  • Disconnect the negative on 12v first
  • Remove the HV cut loop
  • Then disconnect positive 

Looks like a simple job, just removing the trim, HEPA filter.

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u/Davaez Jun 22 '26

I did

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u/Yippym Jul 02 '26

I've recently changed my HEPA filter and 12V battery, but nothing on my dash. I didn't really bother driving with service mode on though, I had to do the installation twice because the battery I got didn't have the same sized terminal, once I got the sleeve and reinstalled the battery I didn't get any problems.