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Tesla CC_a009

Unable to charge - Input wired incorrectly Input wiring to Wall Connector must be corrected

Common search variants: CCa009 · CC-a009 · CC a009 · Search ignores case and common separators.

DriveNot yet established by verified evidence.
ChargeThe verified alert states that charging is unavailable at the affected Wall Connector.
ServiceConsult an electrician. Tesla service involvement is not yet established by verified evidence.
Confidence95%

Quick answer

Tesla alert CC_a009 means charging is unavailable because the Wall Connector input wiring is incorrectly installed. Verified documentation identifies a possible Line-and-Neutral swap and directs the owner to consult an electrician.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

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1. What does CC_a009 mean?

Tesla alert CC_a009 means charging is unavailable because the Wall Connector input wiring is incorrectly installed. Verified documentation identifies a possible Line-and-Neutral swap and directs the owner to consult an electrician.

2. Technical explanation

The verified Tesla/NHTSA documentation describes CC_a009 as: “Unable to charge - Input wired incorrectly. Input wiring to Wall Connector must be corrected.” It states that the Wall Connector input may be miswired, possibly with Line and Neutral swapped. The documentation attributes the issue to incorrectly installed wiring between wall power and the Wall Connector.

3. What system is affected?

The AC supply wiring between the building’s wall power and the Tesla Wall Connector.

4. How serious is this code?

Charging is unavailable at the affected Wall Connector. Overall severity is not yet established by verified evidence.

5. Symptoms you may notice

  • CC_a009 alert displayed.
  • Unable to charge using the affected Wall Connector.

6. Possible causes

  • Incorrectly installed wiring between wall power and the Wall Connector.
  • Possible Line-and-Neutral swap.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

The verified alert states that charging is unavailable at the affected Wall Connector.

9. What you can safely do

  • Consult a qualified electrician to correct the Wall Connector input wiring.
  • Refer the electrician to the installation guide for the applicable Wall Connector.

10. Step-by-step troubleshooting

  1. Do not attempt to correct Wall Connector supply wiring yourself.
  2. Have a qualified electrician assess the wiring between wall power and the Wall Connector in accordance with the Wall Connector installation guide.

11. When to contact service

Consult an electrician. Tesla service involvement is not yet established by verified evidence.

12. What the service center may check

  • Inspect the input wiring between wall power and the Wall Connector.
  • Verify whether Line and Neutral are swapped.
  • Use the applicable Wall Connector installation guide during assessment and correction.

13. Possible repair or resolution

  • Correct the Wall Connector input wiring. The verified documentation does not establish a more specific repair procedure.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA manufacturer communication MC-10250480 (published 2023-12-01): documents CC_a009, a possible Line-and-Neutral swap, and direction to consult an electrician and the Wall Connector installation guide. https://static.nhtsa.gov/odi/tsbs/2023/MC-10250480-9999.pdf
  • NHTSA manufacturer communication MC-10253666 (published 2024-03-27): includes CC_a009 Wall Connector input-wiring information. https://static.nhtsa.gov/odi/tsbs/2024/MC-10253666-9999.pdf

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified NHTSA-hosted Tesla manufacturer communications describe CC_a009 as a Wall Connector input-wiring issue. Official source example: https://static.nhtsa.gov/odi/tsbs/2023/MC-10250480-9999.pdf

19. Frequently asked questions

What does Tesla CC_a009 mean?

It means charging is unavailable because the Wall Connector input wiring must be corrected.

What wiring condition is identified for CC_a009?

Verified documentation says the input may be miswired, possibly with Line and Neutral swapped.

What should I do when CC_a009 appears?

Consult an electrician and refer to the applicable Wall Connector installation guide.

Does CC_a009 prove that the vehicle needs repair?

No. The verified evidence identifies wiring between wall power and the Wall Connector; vehicle repair is not established by that evidence.

20. Sources & verification

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Tesla CC_a009: Unable to charge - Input wired incorrectly Input wiring… | EV Diagnostics