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It is possible your vehicle will shut down unexpectedly. It is also possible that your vehicle will not restart after the
current drive.
You may notice that some nonessential features are not available. This is expected behavior due to your vehicle
preserving energy for essential functions.
What to do:
If this alert is present while you are driving, your vehicle needs to come to a stop as soon as possible. Pull over safely
at your earliest opportunity.
It is recommended that you eliminate or reduce your use of any nonessential features. This can help your vehicle
maintain adequate electrical power for essential functions other than driving, until it can be serviced.
If this alert remains present, it is recommended that you schedule service immediately. Without service, your vehicle
may not drive, may shut down unexpectedly, or may not restart.
VCBATT_a402
Electrical system backup power is unavailable
Vehicle will consume more energy while idle
What this alert means:
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
on page 161.
You may notice that some nonessential features are not available. This is expected behavior due to your vehicle
preserving energy for essential functions.
You may also 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.
There is a chance that an issue affecting the primary power source could cause your vehicle to shut down
unexpectedly.
What to do:
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.
It is recommended that you schedule service at your earliest opportunity, so the backup power source for the
electrical system can be restored.
VCBATT_a496
Vehicle is preparing to shut down
PULL OVER SAFELY
What this alert means:
The electrical system cannot provide adequate support to drive or continue driving. Your vehicle is preparing to shut
down to preserve energy for essential functions other than driving.
Your vehicle cannot be driven or continue driving while this condition continues.
What to do:
Troubleshooting Alerts
256MODEL S Owner
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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 air pressure in one or more of your tires is
significantly lower than the recommended cold tire pressure.
What to do:
You should pull over carefully as soon as possible. In a safe location, check for a flat tire.
You can request Tesla roadside assistance options (mobile tire, loaner wheel, tow) if required. See Contacting Tesla
Roadside Assistance on page 201 for more information.
In a non-emergency situation, it is recommended that you visit a local tire shop for assistance or schedule service
using your Tesla Mobile App.
See Maintaining Tire Pressures on page 173 for detailed information on where to find the recommended cold
pressure (RCP) for your vehicle
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Radio Frequency information: 264
range: 61, 67, 169
displayed on instrument panel: 61
driving tips to maximize: 169
regenerative braking: 67
range assurance: 169
re-naming your vehicle: 11
Re-route: 151
reading light, rear: 27
rear view camera: 77
rear window switches, disabling: 19
recent (Media Player): 154
Recents (navigation): 147
recording: 135, 136
recording videos (Track Mode): 74
regenerative braking: 67
regenerative braking, in Track Mode: 74
relative speed limit: 117
release notes: 144
restarting the touchscreen: 53
Reverse: 56
RFID transponders: 185
ride height, air suspension: 129
roadside assistance: 202
rotating tires: 174
Round Trip Energy (navigating): 151
run out of range: 206, 207
S
safety defects, reporting: 264
safety information: 34, 39, 45
airbags: 45
child seats: 39
seat belts: 34
satellite radio: 154
Schedule: 168
schedule service: 145
scheduled charging: 168
scheduled departure: 168
using: 168
seat adjustment: 29
seat adjustment (driver): 29
seat belts: 32, 33, 180
cleaning: 180
in a collision: 33
overview of: 32
pre-tensioners: 33
wearing when pregnant: 32
seat heaters: 119
seating capacity: 188
seating position: 44
seating position for driving: 29
seats: 119
heaters: 119
security settings: 133
self-leveling: 129
sensors: 81
Sentry Mode: 136
service data recording: 261
service intervals: 171
Settings, erasing: 11
shifting: 55
shortcuts: 8, 10
adding to My Apps: 10
restarting the touchscreen: 8
Show Calendar Upon Entry: 126, 128
side camera(s): 77
Side Clearance (Summon): 105
side collision warning: 111
SiriusXM: 154
slip start: 69
Smart Summon: 108
smartphone: 12
authenticating as a key: 12
Software Reinstall: 143
software reset: 11
software update preferences: 143
software updates: 143
specifications: 192, 194
brakes: 192
High Voltage Battery: 194
low voltage battery: 194
motor: 192
steering: 192
subsystems: 192
suspension: 194
tires: 194
transmission: 192
wheels: 194
specifications (vehicle interior): 190
specifications and dimensions: 190
specifications, exterior: 190
speed assist: 117
speed limit warning: 117
Stability Assist (Track Mode): 74
stability control: 69
standby: 136
starting: 53
steering specifications: 192
steering, automatic: 88
Index