Tesla Sentry Mode Not Working or Keeps Turning Off? How to Fix It

When Sentry Mode fails, it usually fails in one of three ways, and each one has different causes:

1. Sentry is off or won’t turn on. The car isn’t guarding anything.
2. Sentry is on but nothing gets recorded. The car is armed, but there’s no footage afterwards.
3. Sentry records but doesn’t notify you. Clips are saved, but your phone stays quiet.

Work out which one you have first, then go to that section. Unless stated otherwise, Tesla behaviour below comes from the Tesla owner’s manual Sentry Mode page. For a general overview, see our Tesla Sentry Mode guide.

Find your symptom

Why does Sentry Mode keep turning off?

On current Tesla software, the most common reason is Low Power Mode: when the car enters Low Power Mode, Sentry Mode turns off and the Tesla app sends you a notification. If you didn’t get that notification, the usual cause is a location exclusion or a manual toggle that only lasted until your next drive. Check these in order:

1. Low Power Mode (or the 20% rule on older software)

• Current software: Tesla’s manual says “Sentry Mode is not available in Low Power Mode”. Low Power Mode turns on automatically at a battery level you choose between 10% and 20% (default 20%), or whenever you enable it manually at Controls > Charging > Low Power Mode. If it’s enabled, Sentry turns off and you can’t turn it back on (source: Cybertruck owner’s manual, US, software 2026.20; Model 3/Y/S/X manuals use the same wording). According to Not a Tesla App’s 2025.32 release notes, Low Power Mode arrived with update 2025.32 (August 2025).
• Older software: earlier manuals said Sentry Mode “requires your Battery to be at least 20% charged” and turns off below 20% (archived April 2025 US Model 3 manual).
• Fix: charge above your Low Power Mode threshold, lower the threshold toward 10%, or make sure you didn’t leave Low Power Mode on manually.
• Re-enabling after charging: Not a Tesla App reports that since 2025.14.x, Sentry Mode turns back on by itself when you plug in after a low-battery shutoff (2025.14.100 notes). They list it as an undocumented change, and it isn’t in Tesla’s manual, so check that Sentry is back on rather than relying on it.

For how fast Sentry uses battery and how to avoid hitting the threshold, see Low Power Mode and the 20% rule in our battery guide.

2. Location exclusions

In Controls > Safety > Sentry Mode you can choose Exclude Home, Exclude Work or Exclude Favorites. With these on, Sentry doesn’t turn on automatically when you park within about 500 m (1,640 ft) of that saved location. This is easy to forget if you mostly park at home or at the office.

Exclusions only apply to locations saved in your Favorites. Tesla’s manual says to set Home or Work under Navigate > Set Home / Set Work, or to star an address on the map to make it a Favorite.

One possible explanation for Sentry switching on and off unpredictably near home is parking close to the edge of that ~500 m radius, where GPS position can drift. Tesla doesn’t document this, so treat it as a guess. If it matches your situation, try turning the exclusion off and see whether the problem stops.

3. Manual toggles that only last one drive

Turning Sentry on or off manually from the touchscreen or the app overrides your exclusions only until your next drive. If you switched it on at home yesterday, it won’t come back on by itself after today’s drive. To make Sentry turn on every time you leave the car, enable it in Controls > Safety > Sentry Mode. Not a Tesla App also reports that 2025.14.x split the menu into a “one time” Sentry option and an “enable whenever parked” option (2025.14.7 notes). If you only used the one-time option, that explains why Sentry doesn’t come back.

4. A mode that disables Sentry

According to Tesla’s manuals, these modes disable Sentry Mode while they’re active:

• Camp Mode: Sentry Mode and the alarm are disabled.
• Car Wash Mode: disables Sentry Mode, the wipers and walk-away door locking.
• Service Mode: disables security features, including Sentry Mode.

Pet (Dog) Mode does not disable Sentry. Instead, Sentry switches to Disable Sentry Sounds so the alarm doesn’t scare your pet.

5. Dashcam disabled or a system error

Sentry Mode depends on Dashcam. Tesla’s manual says Dashcam “must be enabled for Sentry Mode to work” (Controls > Safety > Dashcam). The car also has to be locked and in Park. If Sentry turns off along with a Dashcam or USB warning, go to USB drive problems or camera errors.

Sentry Mode won’t turn on or is greyed out

If you can’t turn Sentry on at all, it’s almost always one of the causes above that blocks Sentry rather than turning it off later:

• Low Power Mode is active. Tesla says Sentry is “disabled, and unavailable to enable” in Low Power Mode. Charge the car or turn Low Power Mode off at Controls > Charging > Low Power Mode.
• Camp, Car Wash or Service Mode is on. Exit that mode.
• Older software, battery below 20%. Charge above 20%.
• Dashcam is off. Turn it on at Controls > Safety > Dashcam.

If none of these apply and the toggle still won’t respond, try restarting the touchscreen. Owners commonly do this by holding both steering-wheel scroll buttons until the screen goes black and the Tesla logo appears, then waiting a minute or two for it to restart. Do this only while parked.

Sentry Mode is on but not recording

Sentry is armed, but there are no clips afterwards. Check:

• Dashcam is enabled. Without Dashcam, Sentry doesn’t work properly (Controls > Safety > Dashcam).
• A USB drive is installed. Tesla says that without a USB drive, the car still alerts you through the app when it detects a security event, but “without any camera recordings”. So getting alerts doesn’t mean the car is recording.
• The drive is working. If it’s the wrong format, too slow or failing, recording stops. See USB drive problems.
• You’re looking in the right folder. Sentry events are saved to TeslaCam/SentryClips. When the drive fills up, the oldest Sentry clips are deleted first.
• Encryption is on. If you enabled Controls > Safety > Encrypt Dashcam Recordings, clips won’t play on a computer until you decrypt them at dashcam.tesla.com.

Exclusions don’t stop recording while Sentry is on. They stop Sentry from turning on automatically at that location. If you have no clips from home, check whether Sentry was ever on there (location exclusions).

USB drive problems

A bad USB drive is one of the most common reasons Sentry doesn’t record. Tesla’s requirements:

Format it in the car (easiest): use Controls > Safety > Format USB Drive (on some models just Controls > Format USB Drive). The car formats the drive as exFAT and creates the TeslaCam folders. This only works in a front USB port with a drive that has one or no partitions.

Format it on a computer: format as exFAT and create a TeslaCam folder at the top level of the drive.

Use the right port. Tesla says that on some vehicles built after about November 2021, the center-console USB ports only charge devices. Use the glovebox port for Dashcam and Sentry. Many cars from about 2020 onward came with a pre-formatted drive in the glovebox.

Drive size and endurance. Tesla says recordings last about 1 hour on small drives and up to 24 hours on drives of 1 TB or more. HW4 cars on 2025.14+ also record the side (B-pillar) cameras, so clips take more space. Cheap flash drives aren’t built for constant video writes. A high-endurance drive or a portable SSD is a safer choice. If you see errors or missing clips, back up anything you want to keep and reformat the drive in the car. If errors come back, replace the drive.

Camera errors and missed events

“Cameras unavailable” errors: owners report these clearing after a touchscreen restart (see above). If the error comes back after restarts, or one camera stays black, book a service visit.

Dirty or blocked lenses: salt spray, ice and condensation make it harder for the cameras to see. Clean all exterior cameras, including the side (B-pillar) cameras.

Camera-Based Detection is off: at Controls > Safety > Sentry Mode > Camera-Based Detection. When enabled, Sentry uses the external cameras as well as the vehicle’s sensors. When disabled, Tesla says the car “only saves clips to the USB drive if a physical threat is detected”. Tesla doesn’t offer a sensitivity setting beyond this on/off switch.

Sentry Mode isn’t sending notifications

This is usually expected behaviour, not a fault. Tesla’s manual says Sentry Mode “only sends notifications to the mobile app when the alarm is triggered, when someone attempts to open a door or trunk, or sudden jerky motions are detected”. If Sentry doesn’t consider an event a clear threat, such as someone walking past or leaning on the car, it records footage but doesn’t sound the alarm or notify you.

So if Sentry recorded something and you didn’t get an alert, check the clips before assuming something is broken. If you’re not getting alerts even for alarm events:

• Make sure notifications are allowed for the Tesla app in your phone’s settings, and check the Tesla app’s own notification settings.
• Make sure the phone is signed in to the Tesla account linked to the car.
• Note that Disable Sentry Sounds only mutes the car. Tesla says Sentry still sends app notifications with it on.

For a full breakdown of which events Tesla records and which it notifies you about, see Tesla vs Sentry Pro: what gets recorded and notified.

When to contact Tesla Service

Book a service visit in the Tesla app if:

• “Cameras unavailable” or a black camera view keeps coming back after restarts
• Sentry or Dashcam errors continue with a new, correctly formatted drive in the glovebox port
• The touchscreen keeps crashing or restarting

Get alerts for every Sentry event

If Sentry is working and your problem is that the Tesla app stays silent about most events, Sentry Pro sends a push notification, usually within seconds, for the Sentry Mode events your Tesla reports, not just alarms. It works on iOS (including Critical Alerts), Android and Apple Watch. You can also set it to honk or flash the lights automatically, and schedule Sentry Mode to turn on and off by time.

It can only report what your car’s Sentry system detects, so it can’t guarantee every incident is caught. It has no live view or video of its own: tapping a notification opens the Tesla app. Sentry Pro doesn’t wake the car or poll it, so the battery draw comes from Sentry Mode itself. It doesn’t need Premium Connectivity.

Download it on the App Store or Google Play and try every feature free for 7 days.

Have a Sentry Mode issue we didn’t cover? Contact us and we’ll help you troubleshoot. Follow us on Twitter for the latest Tesla security tips.