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Tesla CC_f021

Unable to charge - No primary Wall Connector Check that primary unit is powered and available

Common search variants: CCf021 · CC-f021 · CC f021 · Search ignores case and common separators.

DriveNot yet established by verified evidence.
ChargeCharging is unavailable through the affected Wall Connector load-sharing network until a primary Wall Connector is powered, available, and correctly configured.
ServiceContact a qualified electrician for Wall Connector configuration or power checks. If the alert persists after those checks, Tesla documentation states that the Wall Connector requires service.
Confidence95%

Quick answer

CC_f021 means charging is unavailable because a Tesla Wall Connector load-sharing network does not have an available primary Wall Connector. Tesla’s documented requirement is one—and only one—Wall Connector configured as primary.

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1. What does CC_f021 mean?

CC_f021 means charging is unavailable because a Tesla Wall Connector load-sharing network does not have an available primary Wall Connector. Tesla’s documented requirement is one—and only one—Wall Connector configured as primary.

2. Technical explanation

This is a Tesla OEM charging alert. Verified Tesla owner-manual material filed with NHTSA describes it as a Wall Connector load-sharing (circuit-breaker-sharing) network condition: the network needs one, and only one, Wall Connector set as primary. The alert indicates that no primary Wall Connector is available.

3. What system is affected?

Tesla Wall Connector load-sharing (circuit-breaker-sharing) network and charging availability.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • The vehicle displays CC_f021: “Unable to charge - No primary Wall Connector Check that primary unit is powered and available.”
  • Charging is unavailable through the affected Wall Connector load-sharing network.

6. Possible causes

  • No Wall Connector in the load-sharing network is set as the primary unit.
  • The primary Wall Connector is not powered or is not available.
  • More than one Wall Connector may be configured as primary; Tesla documentation states that only one can be primary.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Charging is unavailable through the affected Wall Connector load-sharing network until a primary Wall Connector is powered, available, and correctly configured.

9. What you can safely do

  • Check that the designated primary Wall Connector is powered and available.
  • Have a qualified electrician confirm the Wall Connector load-sharing configuration.
  • After the electrician has completed necessary work and restored power to the Wall Connector, reconnect it to the vehicle and try charging again.
  • If the issue persists, refer to the Wall Connector installation guide; Tesla documentation states that the Wall Connector requires service.

10. Step-by-step troubleshooting

  1. Tesla documentation directs that only one Wall Connector be set to the primary configuration.
  2. Have an electrician confirm the applicable Wall Connector configuration in accordance with the Wall Connector Installation Manual.
  3. After power is restored, reconnect the Wall Connector to the vehicle and retry charging.
  4. If the condition persists, the Wall Connector requires service.

11. When to contact service

Contact a qualified electrician for Wall Connector configuration or power checks. If the alert persists after those checks, Tesla documentation states that the Wall Connector requires service.

12. What the service center may check

  • Confirm that one—and only one—Wall Connector in the load-sharing network is configured as primary.
  • Confirm that the primary unit is powered and available.
  • Use the Wall Connector Installation Manual and installation guide for configuration and service information.

13. Possible repair or resolution

  • Restore a valid load-sharing configuration with exactly one primary Wall Connector.
  • Restore power to the Wall Connector where applicable.
  • If the condition persists, service the Wall Connector.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA manufacturer communication MC-10253660 (published 2024-03-26): Tesla owner-manual content covering CC_f021 and Wall Connector load sharing. https://static.nhtsa.gov/odi/tsbs/2024/MC-10253660-9999.pdf
  • NHTSA manufacturer communication MC-10250483 (published 2023-12-01): Tesla owner-manual content stating that the network needs one—and only one—primary Wall Connector and directing electrician confirmation. https://static.nhtsa.gov/odi/tsbs/2023/MC-10250483-9999.pdf
  • NHTSA manufacturer communication MC-10240951 (published 2023-06-09): Tesla owner-manual content covering CC_f021. https://static.nhtsa.gov/odi/tsbs/2023/MC-10240951-9999.pdf

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified official source: Tesla owner-manual material submitted to NHTSA. https://static.nhtsa.gov/odi/tsbs/2023/MC-10250483-9999.pdf

19. Frequently asked questions

What does Tesla alert CC_f021 mean?

It means charging is unavailable because a Wall Connector load-sharing network has no primary Wall Connector available. Tesla documentation says the network needs one—and only one—primary unit.

Can more than one Wall Connector be primary?

No. Verified Tesla documentation states that only one Wall Connector can be set to a primary configuration.

What should I do if CC_f021 remains after configuration and power are checked?

Tesla documentation states that the Wall Connector requires service if the issue persists.

Is the vehicle safe to drive with CC_f021?

Not yet established by verified evidence.

20. Sources & verification

Verified
Show all 24 verified sources
Tesla CC_f021: Unable to charge - No primary Wall Connector Check that… | EV Diagnostics