Have you checked for the Battery Health test in your Tesla lately? For some owners, it may still be there, while for others, it has been removed. The useful diagnostic tool that shows your high-voltage battery pack’s health has mysteriously vanished.
In a recent undocumented change with software update 2025.26, Tesla has removed the battery test from the Controls > Service menu and Service Mode from some vehicles.
The Disappearance: A Trail of Clues
Instead of a simple removal, the availability of the Battery Health test seems to now depend on a combination of the vehicle’s model, age, and test history.
Clue #1. The test has been removed from many, but not all, newer vehicles. The option, previously found under Controls > Service > Battery Health, is completely gone for many owners on 2025.26. This has been confirmed on multiple 2025 Model 3s, as well as a 2024 Model S.
Clue #2. The test is read-only for a number of older vehicles. On some 2018 Model 3s that have run a test in the past, the menu option remains, but only displays the previous test results. This includes vehicles that have passed the 6-month minimum between tests. While owners can view the results of the previous battery test, they cannot initiate a new test.
Clue #3. The battery health test has been completely removed for everyone. There are a few vehicles that still have access to it. We’ve confirmed this on a 2025 Model Y, running 2025.26.4, which has never run the test before.
Clue #4. The test has also been completely removed from the Cybertruck, including the results for those who had run the test before. There is no read-only history available on these vehicles, and the whole feature has just been removed.
The End of On-Demand Testing
Perhaps the most significant change for everyone is the fact that Tesla has also removed the on-demand version of the test from the user-accessible Service Mode. Previously, owners could enter Service Mode and run the HV Battery Self Test at any time. As of 2025.26, this option has been completely removed from the menu, even on vehicles that can still access and run the test from the main Controls > Service > Battery Health screen. While the Battery Test could only be run every six months through the main service menu, Service Mode does not have these restrictions.
This is interesting because Tesla provides release notes for Service Mode, which are usually pretty thorough, but they don’t mention the removal of the Battery Health Test from Service Mode.
Tesla also offers a premium, subscription-based feature called Service Mode Plus, but it is unclear whether the battery test has been removed from there as well. Some Service Mode features have been moved over from Service Mode to the paid tier, so this may be one of them as well.
Why the Removal?
Why would Tesla remove a popular and transparent diagnostic tool? While we don’t have any official word on the removal yet, there are a few possibilities.
It could be that Tesla is working on revamping the battery health tool. This could be preparation for a more sophisticated and accurate diagnosis tool in the near future.
Alternatively, it could be because some of the results weren’t as accurate in certain batteries or vehicles, or that it was causing confusion or prompting an increase in service visits from owners concerned about their battery degradation, even if it was in line with expectations.
For now, the removal of this tool is a bit puzzling, but we’ll be keeping a close watch to see if a replacement feature emerges or if Tesla rolls this back.
If you’d like to check whether your vehicle still has the battery health test tool, check out our battery health guide, or our Battery Health Test guide for Service Mode.
