Tesla Model S: Electrical system backup power is unavailable
Vehicle will consume more energy while idle
The backup power source for the electrical system, the low voltage battery, is not available or cannot provide the voltage required to support all vehicle features.
The primary source of electrical power, the high voltage battery system, will continue to support vehicle functions, even when your vehicle is idle. For more information on the high voltage battery, see About the High Voltage Battery.
You may notice that your vehicle consumes more energy than usual when you are not driving it, or that your vehicle displays a lower projected range than you would normally expect after charging. This is normal vehicle behavior when this alert is present, and it will continue until the backup power source is restored.
You may also notice that some nonessential features are not available. This is expected behavior due to your vehicle preserving energy for essential functions.
It is recommended that you limit or avoid the use of any nonessential features. This can help your vehicle maintain adequate electrical power for essential functions.
There is a chance that an issue affecting the primary power source could cause your vehicle to shut down unexpectedly.
It is recommended that you schedule service at your earliest opportunity, so the backup power source for the electrical system can be restored.
READ NEXT:
Low voltage battery service is required
Schedule service - Vehicle may not restart
The low voltage battery cannot provide the electrical support necessary to
drive or continue driving.
If this alert is present while you are driving, your
Air pressure below recommendation for tires
Check pressure and refill air as needed
This alert does NOT indicate that there is a flat tire.
The tire pressure monitoring system (TPMS) has detected that the air pressure in
one or more of your t
Air pressure in tires very low
PULL OVER SAFELY - Check for flat tire
This alert indicates that one or more of the tires on your vehicle is
extremely low or flat.
The tire pressure monitoring system (TPMS) has detected that the a
SEE MORE:
Rails - Diffuser Tray Rear - LH (Remove and Replace)
Warning: If the vehicle has air suspension, activate "Jack"
mode on the touchscreen before raising and supporting the vehicle.
Removal
Raise and support the vehicle (refer to procedure)
Warning: Do not work on an incorrectly supported
vehicle.
Installation, Configuration, and Coolant Purge
Fully clean the area before installing the new charger.
Note: Have an assistant hold up the front of the HVJB
20-30 mm until the coolant hoses have been secured to the charger.
Position the new charger over the mounting studs on the base of
the vehicle, but do not secure the nuts
