Tesla MODEL S 2021 - Troubleshooting Alerts (continued); (PCS_a053) Charge rate reduced - Unexpected voltage drop

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 dierent wall outlets.
• Try charging with dierent 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 131 for more
details. Additional third-party charging stations may also be available in your area to help you to pinpoint the issue.
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. If using other external charging equipment, refer to the
manufacturer's provided documentation for troubleshooting tips.
(PCS_a019)
Power grid or vehicle issue limiting AC charging
Unplug and retry / Try dierent charging location
Charging speed has been reduced due to a condition that aects your vehicle’s ability to charge with AC power. DC
fast charging / Supercharging should still function as expected.
This condition could occur due to power supply disturbances caused by the external charging equipment or by the
electrical power grid. In some cases, this condition can even result from turning on 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 aecting AC charging.
This alert may be accompanied by another alert that specifies the condition aecting AC charging. If so, it is
recommended you start by investigating that alert.
Further troubleshooting tips based on equipment type:
•
If using a Mobile Connector, try charging your vehicle with a dierent wall outlet.
◦
If charging speed is no longer reduced, the issue was likely with the original wall outlet. It is recommended that
you contact an electrician to inspect the building wiring connection to that outlet.
◦
If charging speed is still reduced, the issue may be with the Mobile Connector or the electrical grid.
•
If using a Wall Connector, try charging your vehicle with dierent charging equipment like a Mobile Connector
powered by a separate wall outlet.
◦
If charging speed is no longer reduced, the issue was likely with the Wall Connector. Contact an electrician to
inspect the building wiring connection to the Wall Connector. They should make sure that all wires are
properly connected and torqued according to the installation guide for the Wall Connector.
As this alert may be present due to external charging equipment and power sources, it is recommended that you:
•
Try charging with dierent wall outlets.
• Try charging with multiple, dierent types of charging equipment at dierent 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 131 for more
details. Additional third-party charging stations may also be available in your area to help you to pinpoint the issue.
If this alert persists when attempting to charge at multiple locations and with dierent 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. If using other external charging equipment, refer to the
manufacturer's provided documentation for troubleshooting tips.
Troubleshooting Alerts
241Consumer Information