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Tesla CC_a002

Unable to charge - Insufficient grounding Disconnect and retry or use different equipment

Common search variants: CCa002 · CC-a002 · CC a002 · Search ignores case and common separators.

DriveNot yet established by verified evidence.
ChargeCharging with the equipment producing CC_a002 is unavailable. The verified guidance says to retry once after disconnecting and reconnecting the Wall Connector; if the issue persists, use different equipment.
ServiceContact a qualified electrician for inspection of the Wall Connector grounding, circuit breaker or power distribution box grounding, and Wall Connector connections. Whether Tesla service is required is not yet established by verified evidence.
Confidence95%

Quick answer

Tesla alert CC_a002 means charging is unavailable because a ground fault has been detected: current may be leaking through an unsafe path. Disconnect and reconnect the Wall Connector once; if the alert remains, use different charging equipment and have the Wall Connector installation inspected by an electrician.

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1. What does CC_a002 mean?

Tesla alert CC_a002 means charging is unavailable because a ground fault has been detected: current may be leaking through an unsafe path. Disconnect and reconnect the Wall Connector once; if the alert remains, use different charging equipment and have the Wall Connector installation inspected by an electrician.

2. Technical explanation

Verified Tesla owner-information evidence describes CC_a002 as an insufficient-grounding/ground-fault charging alert. The documented meaning is that current is leaking through an unsafe path, with a possible line-to-ground or neutral-to-ground fault. The evidence identifies the charging equipment and its electrical installation—not a confirmed vehicle component—as the area to evaluate.

3. What system is affected?

AC charging equipment and its grounding, including the Wall Connector, its connections, and grounding at the circuit breaker or power distribution box.

4. How serious is this code?

Unknown. The alert identifies a ground fault and prevents charging, but the supplied evidence does not assign a severity level.

5. Symptoms you may notice

  • The vehicle displays: “Unable to charge - Insufficient grounding.”
  • Charging is unavailable.
  • The alert instructs the driver to disconnect and retry or use different equipment.

6. Possible causes

  • Ground fault.
  • Current leaking through an unsafe path.
  • Possible line-to-ground fault.
  • Possible neutral-to-ground fault.
  • Improper grounding at the Wall Connector, circuit breaker, or power distribution box, or inappropriate Wall Connector connections.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Charging with the equipment producing CC_a002 is unavailable. The verified guidance says to retry once after disconnecting and reconnecting the Wall Connector; if the issue persists, use different equipment.

9. What you can safely do

  • Disconnect the Wall Connector from the vehicle and reconnect it, then try charging again.
  • If the alert persists, use different charging equipment.
  • Have the Wall Connector inspected by an electrician to confirm that it is properly grounded.
  • Ask the electrician to verify grounding at the circuit breaker or power distribution box and appropriate connections to the Wall Connector.
  • Refer to the installation guide for the Wall Connector.

10. Step-by-step troubleshooting

  1. Retry charging after disconnecting and reconnecting the Wall Connector.
  2. If CC_a002 returns, determine whether charging works with different equipment.
  3. Do not attempt electrical grounding or Wall Connector installation repairs yourself; the verified guidance calls for electrician inspection.

11. When to contact service

Contact a qualified electrician for inspection of the Wall Connector grounding, circuit breaker or power distribution box grounding, and Wall Connector connections. Whether Tesla service is required is not yet established by verified evidence.

12. What the service center may check

  • Inspect the Wall Connector to ensure it is properly grounded.
  • Verify proper grounding at the circuit breaker or power distribution box.
  • Verify appropriate connections to the Wall Connector.

13. Possible repair or resolution

  • Resolution depends on the electrician’s inspection of grounding and Wall Connector connections. A specific repair is not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA manufacturer communications containing Tesla owner-information for CC_a002 include MC-10253666, published March 27, 2024; MC-10250480, published December 1, 2023; and MC-10240947, published June 9, 2023. These documents describe the alert and charging-equipment grounding guidance; they do not establish a vehicle repair procedure in the supplied evidence.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official NHTSA-hosted Tesla manufacturer communication: https://static.nhtsa.gov/odi/tsbs/2024/MC-10253666-9999.pdf

19. Frequently asked questions

What does Tesla CC_a002 mean?

It means a ground fault has been detected while charging. Tesla’s documented description says current is leaking through an unsafe path, with a possible line-to-ground or neutral-to-ground fault.

What should I do first?

Disconnect the Wall Connector from the vehicle, reconnect it, and try charging again.

What if CC_a002 returns?

Use different charging equipment and have the Wall Connector inspected by an electrician for proper grounding and connections.

Can I drive with CC_a002?

Not yet established by verified evidence.

20. Sources & verification

Accepted ResearchVerified
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Tesla CC_a002: Unable to charge - Insufficient grounding Disconnect… | EV Diagnostics