NHTSA ID Number: 10253672
Manufacturer Communication Number: Index380
TSB/Document Date: 2024-04-29
Summary
Tesla
does not provide physical owner's manual copies. Instead, all available owner?s manual content is integrated into the vehicle software, and only the content relevant for a given vehicle, based on vehicle configuration and software version installed, is displayed on its touchscreen. This file contains all available owner?s manual content for 2021-2024 Model X vehicles converted to PDF format, and given the distribution method and NHTSA?s submission format requirements, it is the best available representative copy of owner?s manual content. However, a customer who accesses the owner?s manual via their vehicle?s touchscreen would only see the parts of this PDF file that are relevant to their vehicle.
If this alert is accompanied by another alert that specifies the condition affecting AC charging, start by investigating
that alert.
Further troubleshooting tips based on equipment type:
• If using a Mobile Connector, try charging the vehicle with a different wall outlet.
◦ If the vehicle starts to charge, the issue was likely with the original wall outlet.
◦ If the vehicle still does not charge, the issue may be with the Mobile Connector.
• If using a Wall Connector, try charging the vehicle with different charging equipment like a Mobile Connector
powered by a separate wall outlet.
◦ If the vehicle starts to charge, the issue was likely with the Wall Connector.
If the issue is with the original wall outlet or the Wall Connector, contact an electrician to inspect the wiring
connection.
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 218 for more
details.
If this alert persists when attempting to charge at multiple locations and with different charging equipment, it is
recommended that you schedule service.
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Owners Manual
For more information on troubleshooting Mobile Connector or Wall Connector status lights, refer to the product's
Owner's Manual at Charging & Adapter Product Guides.
PCS_a017
Charging stopped - Power lost while charging
Check power source and charging equipment
What this alert means:
Power has been lost during charging. This could result from the charging equipment losing power from the source
(for example, a wall outlet) or from an issue with the charging equipment.
What to do:
This alert is often accompanied by other alerts that can help you identify and troubleshoot the issue. Start by
investigating any other displayed alerts that relate to charging issues.
Alternatively, you can check Mobile Connector or Wall Connector status lights to confirm power to the device, and
also refer to the product owner’s manual for troubleshooting information based on blink codes. If using other (nonTesla) external charging equipment, check for a display or other user interface that provides troubleshooting help.
If there is clearly no power to the charging equipment, check the circuit breaker for the wall outlet / Wall Connector
to make sure it has not tripped.
Further troubleshooting tips based on equipment type:
• If using a Mobile Connector, try charging the vehicle with a different wall outlet.
◦ If the vehicle starts to charge, the issue was likely with the original wall outlet.
◦ If the vehicle still does not charge, the issue may be with the Mobile Connector.
• If using a Wall Connector, try charging the vehicle with different charging equipment like a Mobile Connector
powered by a separate wall outlet.
◦ If the vehicle starts to charge, the issue was likely with the Wall Connector.
If the issue is with the original wall outlet or the Wall Connector, contact an electrician to inspect the wiring
connection.
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 218 for more
details.
For more information on troubleshooting Mobile Connector or Wall Connector status lights, refer to the product's
Owner's Manual at Charging & Adapter Product Guides.
PCS_a019
Power grid or vehicle issue limiting AC charging
Unplug and retry / Try different charging location
What this alert means:
Charging speed has been reduced due to a condition that affects your vehicle’s ability to charge with AC power. DC
fast charging / Supercharging should still function as expected.
This may be due to power supply disturbances caused by the external charging equipment or by the electrical
power grid. In some cases, this condition may be the result of using nearby electric devices that draw a lot of power.
If these possible causes can be ruled out, then a condition with your vehicle itself may also be affecting AC charging.
What to do:
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If this alert is accompanied by another alert that specifies the condition affecting AC charging, start by investigating
that alert.
Further troubleshooting tips based on equipment type:
• If using a Mobile Connector, try charging the vehicle with a different wall outlet.
◦ If the vehicle starts to charge, the issue was likely with the original wall outlet.
◦ If the vehicle still does not charge, the issue may be with the Mobile Connector.
• If using a Wall Connector, try charging the vehicle with different charging equipment like a Mobile Connector
powered by a separate wall outlet.
◦ If the vehicle starts to charge, the issue was likely with the Wall Connector.
If the issue is with the original wall outlet or the Wall Connector, contact an electrician to inspect the wiring
connection.
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 218 for more
details.
If this alert persists when attempting to charge at multiple locations and with different charging equipment, it is
recommended that you schedule service.
For more information on troubleshooting Mobile Connector or Wall Connector status lights, refer to the product's
Owner's Manual at Charging & Adapter Product Guides.
PCS_a032
Poor electric grid power quality detected
Try different charging station or location
What this alert means:
Charging speed has been reduced or charging has been interrupted due to a condition that affects your vehicle’s
ability to charge with AC power. DC fast charging / Supercharging should still function as expected.
The onboard charger in your vehicle has detected power supply disturbances in the electrical power grid. These
disturbances interfere with your vehicle's charging process.
Typical causes of these power supply disturbances include:
• Issues with the building wiring and/or the wall outlet.
• Issues with the external charging equipment.
• Other large electric devices, such as washing machines or air conditioning units, that temporarily draw a lot of
power or otherwise disturb the electrical power grid.
• External conditions affecting the electrical power grid.
What to do:
As this alert is usually specific to external charging equipment and power sources, and it does not typically indicate
an issue with your vehicle that can be resolved by scheduling service, it is recommended that you:
• Try charging with different wall outlets.
• Try charging again (disconnect and reconnect to retry) when other large electric devices are not drawing power.
• Try charging with multiple, different types of charging equipment at different locations.
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 218 for more
details.
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Owners Manual
For more information on troubleshooting Mobile Connector or Wall Connector status lights, refer to the product's
Owner's Manual at Charging & Adapter Product Guides.
PCS_a052
External charging equipment not providing power
Check power source or try different equipment
What this alert means:
Charging cannot begin due to a condition that prevents your vehicle from charging with AC power. DC fast
charging / Supercharging should still function as expected.
Your vehicle has requested AC power from the external charging equipment, but the onboard charger does not
detect any supply voltage coming from the equipment.
This can sometimes be caused by a hardware issue specific to the external charging equipment, which prevents the
charging equipment from switching power to the vehicle on or off when requested. It could also occur due to
another condition affecting the external charging equipment, the power source it is connected to, or your vehicle
itself.
What to do:
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.
Try charging with multiple, different types of charging equipment.
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 218 for more
details.
For more information on troubleshooting Mobile Connector or Wall Connector status lights, refer to the product's
Owner's Manual at Charging & Adapter Product Guides.
PCS_a053
Charge rate reduced - Unexpected voltage drop
Remove extension cords / Have wiring inspected
What this alert means:
Charging speed has been reduced because the onboard charger in your vehicle has detected a large voltage drop
during charging.
Likely causes of this issue include:
• Problems with the building wiring and/or the wall outlet.
• An extension cord or other wiring that cannot support the requested charge current.
This issue can also result from turning on electric devices that draw a lot of power from the same branch circuit
while the vehicle is charging.
What to do:
If this issue has occurred multiple times at your normal charging location, contact an electrician to inspect the
electrical installation. They should check the following:
• Any installed charging equipment and its connection to the building wiring.
• The building wiring, including any wall outlet used with a Mobile Connector.
• The electrical connection to the power utility line where it enters the building.
Discuss with the electrician whether the charge current on the vehicle should be lowered, or if the installation should
be upgraded to support a higher charge current.
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Owners Manual
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 218 for more
details.
For more information on troubleshooting Mobile Connector or Wall Connector status lights, refer to the product's
Owner's Manual at Charging & Adapter Product Guides.
PCS_a054
Charging stopped due to large voltage drop
Remove extension cords / Have wiring inspected
What this alert means:
Charging has been interrupted because the onboard charger in your vehicle has detected an unusually large voltage
drop.
Likely causes of this issue include:
• Problems with the building wiring and/or the wall outlet.
• An extension cord or other wiring that cannot support the requested charge current.
This issue can also result from turning on electric devices that draw a lot of power from the same branch circuit
while the vehicle is charging.
What to do:
If this issue has occurred multiple times at your normal charging location, contact an electrician to inspect the
electrical installation. They should check the following:
• Any installed charging equipment and its connection to the building wiring.
• The building wiring, including any wall outlet used with a Mobile Connector.
• The electrical connection to the power utility line where it enters the building.
Discuss with the electrician whether the charge current on the vehicle should be lowered, or if the installation should
be upgraded to support a higher charge current.
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 218 for more
details.
For more information on troubleshooting Mobile Connector or Wall Connector status lights, refer to the product's
Owner's Manual at Charging & Adapter Product Guides.
PCS_a073
External charging equipment error detected
Try different charging equipment
What this alert means:
AC charging cannot begin due to a condition that prevents your vehicle from charging with AC power. DC fast
charging / Supercharging should still function as expected.
Your vehicle's onboard charger is detecting input voltage at the charge port when no power has been requested
from the external charging equipment, which indicates the external charging equipment is not functioning as
expected.
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This can sometimes be caused by a hardware issue specific to the external charging equipment, which prevents the
charging equipment from switching power to the vehicle on or off when requested. It could also occur due to
another condition affecting the external charging equipment, or a condition affecting your vehicle itself.
What to do:
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.
Try charging with multiple, different types of charging equipment.
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 218 for more
details.
For more information on troubleshooting Mobile Connector or Wall Connector status lights, refer to the product's
Owner's Manual at Charging & Adapter Product Guides.
PCS_a090
Charging slowed - Some AC phases not powered
Check power source and charging equipment
What this alert means:
Charging speed has been reduced due to a condition that affects your vehicle’s ability to charge with AC power. DC
fast charging / Supercharging should still function as expected.
Your vehicle's onboard charger has detected that one or more power converters is not receiving the necessary AC
input voltage. For example: during three-phase charging, one phase might be missing from the AC input power
provided by the external source. This could occur due to a condition affecting the external charging equipment, the
power source it is connected to, or your vehicle itself.
What to do:
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.
Try charging with multiple, different types of charging equipment.
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 218 for more
details.
For more information on troubleshooting Mobile Connector or Wall Connector status lights, refer to the product's
Owner's Manual at Charging & Adapter Product Guides.
PM_a092 / PMF_a092 / PMR_a092 / PMREL_a092 / PMRER_a092
Powertrain issue detected - Schedule service
Issue may persist even if functionality is restored
What this alert means:
Your vehicle's powertrain requires service. Power, speed, and acceleration may be reduced, and your vehicle may
need to shut down while driving.
This alert indicates a persistent condition requiring powertrain inspection and service.
Even if this alert clears after the current drive and does not return during subsequent drives, service is required to
resolve the powertrain issue your vehicle has detected.
What to do:
It is recommended that you schedule service for your vehicle's powertrain at your earliest opportunity.
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Owners Manual
Without service, your vehicle may continue to have reduced power, speed, and acceleration, may experience
conditions that require it to shut down while driving, or may become unable to drive.
TAS_a313
Adaptive ride control degraded
Ride comfort may be reduced
What this alert means:
There is an issue with your vehicle’s Adaptive Suspension Damping system. As a result, the system cannot provide
real-time adjustments to the suspension system to optimize both ride and handling.
Instead, all dampers are receiving fixed current. Your ride may be softer or firmer than usual.
What to do:
If this alert persists throughout subsequent drives, schedule service at your earliest convenience. Your vehicle is OK
to drive in the meantime.
This alert is accompanied by a yellow indicator light on the instrument panel. For more information, see Air
Suspension on page 122.
TAS_a314
Adaptive ride control degraded
Drive with caution
What this alert means:
There is an issue with your vehicle’s Adaptive Suspension Damping system. As a result, the system cannot provide
real-time adjustments to the suspension system to optimize both ride and handling, and your ride may be softer
than usual.
What to do:
If this alert persists throughout subsequent drives, schedule service at your earliest convenience. Your vehicle is OK
to drive in the meantime.
This alert is accompanied by a red indicator light on the instrument panel. For more information, see Air Suspension
on page 122.
UI_a004
Front trunk open
Proceed with caution
What this alert means:
Your vehicle's front trunk (hood) is detected open while driving.
This alert indicates at least one of the two latches securing the hood, the front trunk primary and/or secondary latch,
cannot be confirmed closed (confirmed as fully secured) when your vehicle is shifted into a gear other than Park.
What to do:
As this condition may lead to the front trunk opening while driving, it is recommended that you drive carefully until
you can safely bring your vehicle to a stop and shift into Park.
Once your vehicle is parked, check the front trunk (hood) to make sure it is fully closed (both latches are fully
engaged). For more information, see Closing instructions for the Front Trunk on page 45.
The alert should clear once your vehicle is shifted into Park. However, it may return once you start driving if you do
not first inspect and fully secure the hood.
If this alert persists across multiple drives, or occurs with increasing frequency over several drives, it is recommended
that you schedule service at your earliest convenience.
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Owners Manual
For more information on the front trunk, see Front Trunk on page 45.
UI_a006
Service is required
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.
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 218 for more
details.
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Owners Manual
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 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 218 for more
details.
For more information on troubleshooting Mobile Connector status lights and charging issues, refer to the product's
owner's manual.
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 218 for more
details.
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Owners Manual
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 218 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:
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 218 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.
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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.
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 218 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.
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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 218 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.
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 218 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 235.
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.
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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 218 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 235.
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.
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 218 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:
344
Owners Manual
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 218 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:
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.
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Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
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Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
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View Latest Vehicle Investigations
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View Latest Vehicle Complaints
TSB/Document ID: Index380
Replacement Service Bulletin Number:
MFR Communication Date: 2024-03-30
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT
MFR Component System:
MFR Component Subsystem:
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- [Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way. THINKSCAN 689BT Bidirectional Scan Tool Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
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, SRS, TPMS, and more — all in one place. Finally stop wondering if you’re missing something important; get the full picture and clear codes with ease.
Last update on 2026-07-02 / Affiliate links / Images from Amazon Product Advertising API
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Last update on 2026-06-30 / Affiliate links / Images from Amazon Product Advertising API
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Last update on 2026-07-02 / Affiliate links / Images from Amazon Product Advertising API
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