Tesla MODEL X 2021 Owner's Manual page 292

Troubleshooting Alerts
Continue to press the brake pedal as you normally would, and do not "pump" (repeatedly press
and release) the pedal as this will interrupt the function.
This alert will clear when your vehicle comes to a stop or you are no longer pressing the brake
pedal. It may still be displayed for up to 5 seconds afterward.
When this assist function activates, you may feel the brake pedal pull away from your foot and
notice a strong increase in brake pressure. You may also hear a pumping sound coming from the
brake hydraulic unit at the front of the vehicle. This will usually last for a few seconds, depending
on road surface and vehicle speed. This is completely normal and does not indicate any issue
with your vehicle.
Reduced braking performance is usually temporary, and can occur for a number of reasons
including high brake temperatures after heavy brake use, or driving in extremely cold or wet
conditions. It can also indicate that your brake pads or rotors have worn to the point that
normal replacement is needed.
If you continue to experience reduced braking performance which does not improve over time,
please contact Tesla service at your convenience for a brake inspection.
For more information, see
(PCS_a016)
Cannot charge - Poor grid power quality possible
Retry / Try other charge location or Supercharging
Charging has stopped due to a condition that prevents your vehicle from charging 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
affecting AC charging.
This alert is often accompanied by other alerts that can help you identify and troubleshoot the
condition. Start by investigating any other displayed alerts that relate to charging.
Further troubleshooting tips based on equipment type:
• If using a Mobile Connector, try charging your vehicle with a different wall outlet.
◦ If your vehicle starts to charge and continues to charge as expected, 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 your vehicle still does not start to charge, or does not continue to charge as expected,
the issue may be with the Mobile Connector or the electrical grid.
• If using a Wall Connector, try charging your vehicle with different charging equipment like a
Mobile Connector powered by a separate wall outlet.
◦ If your vehicle starts to charge and continues to charge as expected, 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.
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Hydraulic Fade Compensation on page 78.
MODEL X Owner's Manual