Schedule service now
What this alert means:
This alert is set remotely by Tesla when a condition requiring service is detected on your vehicle.
This alert can be set due to various conditions. When you schedule service, more information should be available.
This alert can only be cleared by a service technician after your vehicle has been serviced.
What to do:
As this alert can be present due to various conditions, it is recommended that you schedule service at your earliest
convenience.

UI_a137
Active service connection to vehicle
Service performing remote diagnostics
What this alert means:
A service technician is remotely logged into your vehicle for diagnosis or repair. You may notice some loss of
Infotainment functionality while the connection persists, but this alert does not indicate an issue with your vehicle.
Your vehicle is OK to drive.
What to do:
This alert should clear automatically after the technician completes vehicle diagnosis or repair. You may find it
necessary to restart your touchscreen to restore full Infotainment functionality after the alert has cleared. For more
information, see Restarting the Touchscreen in your vehicle's Do It Yourself Guide.
If this alert does not clear after 24 hours, it is recommended that you schedule service via your Tesla Mobile App or
with an independent service provider. Please note that independent service provider options may vary, based on
your vehicle configuration and your location.

UMC_a001
Unable to charge with Mobile Connector
Inadequate outlet grounding - Try another outlet
What this alert means:
The Mobile Connector has detected that the electrical outlet has insufficient grounding, likely caused by an
inadequate or missing ground connection.
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This does not indicate an issue with your Mobile Connector or vehicle, but instead points to an issue with the wall
outlet / electrical installation the Mobile Connector is connected to.
What to do:
Have the electrical installation inspected by an electrician. Your electrician should make sure there is proper
grounding at your circuit breaker or power distribution box, and also make sure that appropriate connections are
made to the outlet, before you attempt to plug in the Mobile Connector again.
If you need to charge in the meantime, try charging using a different outlet, at another location, or with another type
of charging station.
You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 177 for more
details.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.

UMC_a002
Unable to charge - Mobile Connector GFCI tripped
Unplug charge handle from charge port and retry
What this alert means:
The vehicle cannot charge because the ground-fault circuit interrupter (GFCI) in the Mobile Connector has tripped.
Like the GFCI in a wall outlet, this feature is designed to stop the flow of electricity when there is a problem. It has
interrupted charging to protect your vehicle and the charging equipment.
This could happen for many reasons. The problem could be in the charge cable, the charge handle, the charge port,
or even an onboard vehicle component.
What to do:
Inspect the charge port and the charge handle for pooled water or unusual levels of moisture. If you find excessive
moisture, wait and let both the inside area of the charge port and the exposed portion of the charge handle dry
sufficiently before trying again.
Inspect the cargo bed outlets for signs of moisture. If any moisture is detected, this may be the issue. Allow any
moisture in the outlets to dry completely before attempting to AC charge again.
Inspect the charge equipment for damage.
• If the cable is in any way damaged or deteriorated, do not use it. Try different charging equipment instead.
• If the cable is in good condition, try charging again with the same Mobile Connector.
If the issue persists and prevents charging, try charging with different charging equipment.
This alert is usually specific to external charging equipment and power sources and does not typically indicate an
issue with your vehicle that can be resolved by scheduling service.
You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 177 for more
details.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.

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UMC_a004
Unable to charge with Mobile Connector
Voltage too high / Try a different wall outlet
What this alert means:
The vehicle cannot charge, or charging is interrupted, because either the Mobile Connector:
• Detects the wall outlet voltage is too high, or
• Detects an unexpected increase in supply voltage from the wall outlet.
What to do:
Try charging the vehicle with a different wall outlet. If the vehicle starts to charge, the issue was likely with the
original wall outlet. Contact an electrician to inspect the building wiring connection to that outlet.
If the vehicle still does not charge when you try a different wall outlet, try charging at a different location.
You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 177 for more
details.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.

UMC_a005
Unable to charge with Mobile Connector
Voltage too low / Try a different wall outlet
What this alert means:
The vehicle cannot charge, or charging is interrupted, because either the Mobile Connector:
• Does not detect enough supply voltage from the wall outlet, or
• Detects an unexpected drop in supply voltage from the wall outlet.
What to do:
Try charging the vehicle with a different wall outlet. If the vehicle starts to charge, the issue was likely with the
original wall outlet. Contact an electrician to inspect the building wiring connection to that outlet.
If the vehicle still does not charge when you try a different wall outlet, try charging at a different location.
This alert is usually specific to external charging equipment and power sources and does not typically indicate an
issue with your vehicle that can be resolved by scheduling service.
You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 177 for more
details.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.

UMC_a007
Mobile Connector control box temperature high
Let Mobile Connector cool to resume charging
What this alert means:

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Charging has been interrupted because the Mobile Connector has detected a high temperature inside its control box
housing.
What to do:
Make sure the Mobile Connector is not covered by anything, and that there is no heat source nearby. If the problem
persists in normal ambient temperatures (under 100°F or 38°C), service is required.
You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 177 for more
details.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.

UMC_a008
Unable to charge - Wall plug temperature high
Wall outlet and wiring inspection recommended
What this alert means:
High temperature detected by Mobile Connector alerts indicate the outlet used to charge is becoming too warm, so
charging has stopped to protect the outlet.
This does not indicate an issue with your Mobile Connector or vehicle, but instead points to an issue with the wall
outlet / electrical installation the Mobile Connector is connected to.
A warm outlet may be caused by a plug that is not fully inserted, a loose building wiring connection to the outlet, or
an outlet that is beginning to wear out.
What to do:
Make sure your adapter is fully plugged into the outlet. If charging speed does not return to normal, contact an
electrician to inspect the outlet and building wiring connections to the outlet and complete any repairs needed.
If the outlet is worn, it should be replaced with a high-quality outlet. Consider upgrading to a Tesla Wall Connector
for greater convenience and highest charging speed.

UMC_a009
Cannot charge - Charge handle temperature high
Check charge handle or charge port for debris
What this alert means:
Charging has been interrupted because the Mobile Connector has detected a high temperature in the charge handle
that connects to your vehicle's charge port.
What to do:
Make sure the Mobile Connector is fully inserted into your vehicle's charge port inlet.
Inspect the charge port inlet and the Mobile Connector handle for any obstructions or moisture. Make sure any
obstruction in the charge port or Mobile Connector handle has been removed and any moisture has been allowed to
dry, then try re-inserting the Mobile Connector handle into the charge port.
Also make sure the charge handle of the Mobile Connector is not covered by anything, and that there is no heat
source nearby.
If the alert persists in normal ambient temperatures (under 100°F or 38°C), and occurs during multiple charging
attempts, this may indicate a condition affecting the Mobile Connector or your vehicle. It is recommended that you
schedule service at your convenience.

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You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 177 for more
details.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.

UMC_a010
Mobile Connector to adapter connection hot
Let cool - Plug adapter fully into Mobile Connector
What this alert means:
Charging has been interrupted because the Mobile Connector has detected a high temperature at the connection
between the wall plug adapter and the control box.
What to do:
Make sure the wall plug adapter is fully connected to the Mobile Connector control box.
Also make sure the wall plug adapter is not covered by anything, and that there is no heat source nearby.
After unplugging from the power source (wall outlet), inspect the wall plug adapter connection and the Mobile
Connector control box connection for any obstructions or moisture. Make sure any obstruction has been removed
and any moisture has been allowed to dry, then try re-inserting the wall plug adapter into the Mobile Connector and
then connecting to the power source (wall outlet).
Once the Mobile Connector control box temperature has decreased and any obstruction has been removed, the alert
should clear and charging should possible.
You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 177 for more
details.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.

UMC_a011
Charging equipment communication error
Try again or try different equipment
What this alert means:
Your vehicle is unable to charge because it cannot communicate effectively with the Mobile Connector. The Mobile
Connector cannot confirm via proximity detection that the charge handle is fully connected to your vehicle.
What to do:
First, confirm the lack of effective communication is caused by the Mobile Connector rather than an issue with your
vehicle. This is usually the case.
To confirm this, try charging the vehicle using different external charging equipment.
• If the vehicle begins charging, the issue was likely with the Mobile Connector.
• If the vehicle still does not charge, the issue may be with the vehicle.
Inspect the charge port inlet and the Mobile Connector handle for any obstructions (use a flashlight as necessary).
Make sure any obstruction has been removed and any moisture has been allowed to dry, then try re-inserting the
Mobile Connector handle into the charge port.
This alert is usually specific to external charging equipment and power sources and does not typically indicate an
issue with your vehicle that can be resolved by scheduling service.
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You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 177 for more
details.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.
For more information on charging, see Charging Instructions on page 193.

UMC_a012
Charging equipment communication error
Try again or try different equipment
What this alert means:
Your vehicle is unable to charge because it cannot communicate effectively with the Mobile Connector. The Mobile
Connector detects that it cannot generate or maintain a valid control pilot signal.
What to do:
First, confirm the lack of effective communication is caused by the Mobile Connector rather than an issue with your
vehicle. This is usually the case.
To confirm this, try charging the vehicle using different external charging equipment.
• If the vehicle begins charging, the issue was likely with the Mobile Connector.
• If the vehicle still does not charge, the issue may be with the vehicle.
Inspect the charge port inlet and the Mobile Connector handle for any obstructions (use a flashlight as necessary).
Make sure any obstruction has been removed and any moisture has been allowed to dry, then try re-inserting the
Mobile Connector handle into the charge port.
This alert is usually specific to external charging equipment and power sources and does not typically indicate an
issue with your vehicle that can be resolved by scheduling service.
You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 177 for more
details.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.
For more information on charging, see Charging Instructions on page 193.

UMC_a013
Wall plug adapter error - Charge rate reduced
Plug adapter fully into Mobile Connector and retry
What this alert means:
Your Mobile Connector is unable to communicate with the wall plug adapter. Because your Mobile Connector cannot
monitor the wall plug adapter temperature, charge current is automatically reduced to 8A.
What to do:
1. Unplug your Mobile Connector, including the wall plug adapter, completely from the wall outlet.
2. Make sure the connection between the wall plug adapter and the main body of your Mobile Connector is secure.
a. Disconnect the wall plug adapter completely from the main body of your Mobile Connector.
b. Fully reinsert the wall plug adapter into the main body of your Mobile Connector by pushing it into the socket
until it snaps into place.

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3. Try charging again by plugging the Mobile Connector, including wall plug adapter, fully into the wall outlet.
4. If the alert persists, try using a different wall plug adapter (see steps above to make sure the adapter is fully
connected to your Mobile Connector).
a. If the alert is no longer present, the issue is likely with the wall plug adapter you were using previously.
b. If the alert persists, the issue is likely with your Mobile Connector.
If needed, obtain another wall plug adapter or Mobile Connector.
In the meantime, you can continue to charge with the same equipment. The charge rate will be reduced, as charge
current will be limited to 8A while this condition persists.
You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 177 for more
details.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.

UMC_a014
Wall plug adapter error - Charge rate reduced
Plug adapter fully into Mobile Connector and retry
What this alert means:
Your Mobile Connector is unable to communicate with the wall plug adapter. Because your Mobile Connector cannot
identify the type of wall outlet the wall plug adapter is connected to, charge current is automatically reduced to 8A.
What to do:
1. Unplug your Mobile Connector, including the wall plug adapter, completely from the wall outlet.
2. Make sure the connection between the wall plug adapter and the main body of your Mobile Connector is secure.
a. Disconnect the wall plug adapter completely from the main body of your Mobile Connector.
b. Fully reinsert the wall plug adapter into the main body of your Mobile Connector by pushing it into the socket
until it snaps into place.
3. Try charging again by plugging the Mobile Connector, including wall plug adapter, fully into the wall outlet.
4. If the alert persists, try using a different wall plug adapter (see steps above to make sure the adapter is fully
connected to your Mobile Connector).
a. If the alert is no longer present, the issue is likely with the wall plug adapter you were using previously.
b. If the alert persists, the issue is likely with your Mobile Connector.
If needed, obtain another wall plug adapter or Mobile Connector. In the meantime, you can continue to charge with
the same equipment. The charge rate will be reduced, as charge current will be limited to 8A while this condition
persists.
You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 177 for more
details.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.

UMC_a015
Wall plug adapter error - Charge rate reduced
Plug adapter fully into Mobile Connector and retry
What this alert means:

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Your Mobile Connector is unable to communicate with the wall plug adapter. Because your Mobile Connector cannot
identify the type of wall outlet the wall plug adapter is connected to, charge current is automatically reduced to 8A.
What to do:
1. Unplug your Mobile Connector, including the wall plug adapter, completely from the wall outlet.
2. Make sure the connection between the wall plug adapter and the main body of your Mobile Connector is secure.
a. Disconnect the wall plug adapter completely from the main body of your Mobile Connector.
b. Fully reinsert the wall plug adapter into the main body of your Mobile Connector by pushing it into the socket
until it snaps into place.
3. Try charging again by plugging the Mobile Connector, including wall plug adapter, fully into the wall outlet.
4. If the alert persists, try using a different wall plug adapter (see steps above to make sure the adapter is fully
connected to your Mobile Connector).
a. If the alert is no longer present, the issue is likely with the wall plug adapter you were using previously.
b. If the alert persists, the issue is likely with your Mobile Connector.
If needed, obtain another wall plug adapter or Mobile Connector. In the meantime, you can continue to charge with
the same equipment. The charge rate will be reduced, as charge current will be limited to 8A while this condition
persists.
You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 177 for more
details.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.

UMC_a016
Mobile Connector control box temperature high
Maximum charge rate reduced
What this alert means:
Charge current has been temporarily reduced because the Mobile Connector has detected increased temperature
inside its control box housing.
What to do:
Make sure the Mobile Connector is not covered by anything, and that there is no heat source nearby. If the problem
persists in normal ambient temperatures (under 100°F or 38°C), service is required.
You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 177 for more
details.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.

UMC_a017
Charge rate reduced - Wall plug temperature high
Wall outlet and wiring inspection recommended
What this alert means:
High temperature detected by Mobile Connector alerts indicate the outlet used to charge is becoming too warm, so
charging has been slowed to protect the outlet.

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This is not typically an issue with your vehicle or your Mobile Connector, but rather an issue with the outlet. A warm
outlet may be caused by a plug that is not fully inserted, a loose building wiring connection to the outlet, or an
outlet that is beginning to wear out.
What to do:
Make sure your adapter is fully plugged into the outlet. If charging speed does not return to normal, contact an
electrician to inspect the outlet and building wiring connections to the outlet and complete any repairs needed.
If the outlet is worn, it should be replaced with a high-quality outlet. Consider upgrading to a Tesla Wall Connector
for greater convenience and highest charging speed.

UMC_a018
Charge rate reduced - Handle temperature high
Check charge handle or charge port for debris
What this alert means:
Charge current has been temporarily reduced because the Mobile Connector has detected increased temperature in
the charge handle that connects to your vehicle's charge port.
What to do:
Make sure the Mobile Connector is fully inserted into your vehicle's charge port inlet.
Inspect the charge port inlet and the Mobile Connector handle for any obstructions or moisture. Make sure any
obstruction in the charge port or Mobile Connector handle has been removed and any moisture has been allowed to
dry, then try re-inserting the Mobile Connector handle into the charge port.
Also make sure the charge handle of the Mobile Connector is not covered by anything, and that there is no heat
source nearby.
If the alert persists in normal ambient temperatures (under 100°F or 38°C), and occurs during multiple charging
attempts, this may indicate a condition affecting the Mobile Connector or your vehicle. It is recommended that you
schedule service at your convenience.
You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 177 for more
details.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.

UMC_a019
Mobile Connector to adapter connection hot
Maximum charge rate reduced
What this alert means:
Charge current has been reduced because the Mobile Connector has detected a high temperature at the connection
between the wall plug adapter and the control box.
What to do:
Make sure the wall plug adapter is fully connected to the Mobile Connector control box.
After unplugging from the power source (wall outlet), inspect the wall plug adapter connection and the Mobile
Connector control box connection for any obstructions or moisture.
It is recommended that any debris / foreign objects be removed. Make sure any obstruction has been removed and
any moisture has been allowed to dry, then try re-inserting the wall plug adapter into the Mobile Connector and then
connecting to the power source (wall outlet).

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Also make sure the wall plug adapter is not covered by anything, and that there is no heat source nearby. If the alert
persists in normal ambient temperatures (under 100°F or 38°C), and occurs during multiple charging attempts, this
may indicate a condition affecting the Mobile Connector or your vehicle. It is recommended that you schedule
service at your convenience.
You can also try charging your vehicle using a Tesla Supercharger or Destination Charging location, all of which can
be located through the map on your vehicle's touchscreen display. See Maps and Navigation on page 177 for more
details.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.
What this alert means:
What to do:

VCLEFT_a194
Electrical system power reduced
Vehicle may shut down unexpectedly
What this alert means:
The electrical system cannot maintain the voltage required to support all vehicle features.
If this alert is present while you are driving, it is possible your vehicle will shut down unexpectedly.
If this alert is present when your vehicle is in Park or when it first wakes, it is possible your vehicle may not have
adequate electrical power to start driving. A separate vehicle alert may be present to indicate that condition.
What to do:
It is recommended that you eliminate or reduce your use of any non-essential features. This can help your vehicle
maintain adequate electrical power for essential functions.
If this alert remains active, schedule service immediately. Without service, your vehicle may shut down unexpectedly
or may not restart.

VCLEFT_a208
Schedule service to replace low voltage battery
Software will not update until battery is replaced
What this alert means:
The low voltage battery is showing degraded performance and needs to be replaced. Until the low voltage battery is
replaced, vehicle software updates will not complete.
What to do:
It is recommended that you have the low voltage battery replaced at your earliest convenient opportunity.
You can schedule service via your Tesla Mobile App, or with an independent service provider that offers low voltage
battery replacement for your vehicle. Please note that independent service provider options may vary, based on your
vehicle configuration and your location.
If the low voltage battery does not have enough electrical power to turn on your vehicle or open the doors, follow
the instructions in Jump Starting on page 260.
For more information on the battery system, see High Voltage Battery Information on page 191.

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VCLEFT_a207
Electrical system power reduced
Vehicle shutting down
What this alert means:
The low voltage battery cannot provide the electrical support necessary to drive or continue driving. Your vehicle is
shutting 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:
If this alert is present while you are driving, your vehicle needs to come to a stop immediately. It is recommended
that you:
• Pull over safely immediately
• Use your Mobile App to contact Tesla Roadside Assistance immediately, or seek other roadside assistance if
preferred
If you do not pull over safely within a short time, your vehicle may shut down unexpectedly. It is also possible that
your vehicle will not restart once parked.
When this alert is present, the electrical system cannot maintain the voltage required to support all vehicle features.
Many vehicle functions may no longer work.
It is possible your vehicle may lose all electrical power. If this occurs, you can still use the manual door releases to
exit the vehicle if necessary. For more information, see Opening Doors from the Interior on page 37.
This alert may be present due to various vehicle conditions. For more information and further recommended actions,
check for other active vehicle alerts.
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.

VCLEFT_a592
Electrical system is unable to support all features
Switching off features to conserve energy
What this alert means:
The electrical system cannot support all vehicle features. Your vehicle is shutting down nonessential features to
preserve energy for essential functions.
If you are driving when this alert is present, it is possible your vehicle may shut down unexpectedly. It is also possible
that your vehicle will not restart once parked.
Nonessential features may be unavailable, including seat heaters, cabin climate control, and in-vehicle entertainment.
This is expected behavior intended to help your vehicle maintain adequate electrical power for essential functions,
including the ability to operate headlights, windows and doors, hazard lights, and the front trunk (frunk).
It is possible your vehicle may lose all electrical power. If this occurs, you can still use the manual door releases to
exit the vehicle if necessary. For more information, see Opening Doors from the Interior on page 37.
What to do:
This alert may be present due to various vehicle conditions. For more information and further recommended actions,
check for other active vehicle alerts.

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VCLEFT_a221
Electrical system is unable to support all features
Schedule service
What this alert means:
The low voltage battery cannot provide the electrical support necessary to drive or continue driving.
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.

VCLEFT_ a365 / VCREAR_ a365
Incline too steep to park vehicle and trailer
Parking brake may not hold - Move to flatter area
What this alert means:
Your vehicle has detected an attempt to park on a slope of 10% grade or greater while Trailer Mode is active. This
alert displays whenever Trailer Mode is active and your vehicle is parked on a steep slope, even if no trailer is
attached.
What to do:
• No trailer attached: Exit Trailer Mode manually via your vehicle touchscreen, so the alert no longer displays when
parking on steep slopes without a trailer.
◦ For more information, see Trailer Mode in Towing a Trailer on page 132.
• Trailer attached: It is recommended that you park your vehicle and trailer in a more level area.
◦ The parking brake may not hold both vehicle and trailer on slopes of 10% grade or greater.
For more information, see Trailer Mode and Parking with a Trailer in Towing a Trailer on page 132.

VCLEFT_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 High Voltage Battery
Information on page 191.
You may notice that some nonessential features are not available. This is expected behavior due to your vehicle
preserving energy for essential functions.
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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.

VCLEFT_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:
If this alert is present while you are driving, your vehicle needs to come to a stop as soon as possible. It is
recommended that you:
• Pull over safely at your earliest opportunity
• Use your Mobile App to contact Tesla Roadside Assistance immediately, or seek other roadside assistance if
preferred
If you do not pull over safely within a short time, your vehicle may shut down unexpectedly. It is also possible that
your vehicle will not restart once parked.
It is possible your vehicle may lose all electrical power. If this occurs, you can still use the manual door releases to
exit the vehicle if necessary. For more information, see Opening Doors from the Interior on page 37.
This alert may be present due to various vehicle conditions. For more information and further recommended actions,
check for other active vehicle alerts.

VCSEC_a221
Air pressure below recommendation for tires
Check pressure and refill air as needed
What this alert means: