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Tesla UMC_a009

Cannot charge - Charge handle temperature high Check charge handle or charge port for debris

Common search variants: UMCa009 · UMC-a009 · UMC a009 · Search ignores case and common separators.

DriveNot yet established by verified evidence.
ChargeCharging was interrupted for this alert. Whether charging can resume after the documented checks is not yet established by verified evidence.
ServiceNot yet established by verified evidence.
Confidence95%

Quick answer

UMC_a009 means charging was interrupted because the Tesla Mobile Connector detected a high temperature in the charge handle connected to the vehicle charge port. Tesla’s documented instruction is to ensure the Mobile Connector is fully inserted and to check the charge handle and charge port for debris.

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 UMC_a009 mean?

UMC_a009 means charging was interrupted because the Tesla Mobile Connector detected a high temperature in the charge handle connected to the vehicle charge port. Tesla’s documented instruction is to ensure the Mobile Connector is fully inserted and to check the charge handle and charge port for debris.

2. Technical explanation

This is a Tesla OEM alert associated with the Mobile Connector charge handle. Verified NHTSA-hosted Tesla owner-documentation evidence states that charging is interrupted when the Mobile Connector detects high temperature in the handle that connects to the vehicle charge port. The evidence does not establish a component failure or a high-voltage-battery fault.

3. What system is affected?

Tesla Mobile Connector charge handle and the vehicle charge-port connection.

4. How serious is this code?

The database severity is unknown. The verified alert indicates an interrupted charging event caused by high detected temperature at the charge-handle connection.

5. Symptoms you may notice

  • Charging is interrupted.
  • The vehicle displays UMC_a009: “Cannot charge - Charge handle temperature high Check charge handle or charge port for debris.”

6. Possible causes

  • High temperature detected by the Mobile Connector in the charge handle that connects to the vehicle charge port.
  • Debris in the charge handle or vehicle charge port is specifically identified in the alert text for checking.
  • Whether any additional cause is present is not yet established by verified evidence.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Charging was interrupted for this alert. Whether charging can resume after the documented checks is not yet established by verified evidence.

9. What you can safely do

  • Make sure the Mobile Connector is fully inserted into the vehicle charge port.
  • Check the charge handle and charge port for debris, as directed by the alert.
  • Do not attempt high-voltage repair procedures.

10. Step-by-step troubleshooting

  1. Verify that the Mobile Connector is fully inserted into the vehicle charge port.
  2. Check the charge handle and vehicle charge port for debris.
  3. If the alert persists after these documented checks, further troubleshooting steps are not yet established by verified evidence.

11. When to contact service

Not yet established by verified evidence.

12. What the service center may check

  • Inspect the Mobile Connector handle-to-charge-port connection for full insertion.
  • Check the charge handle and vehicle charge port for debris.

13. Possible repair or resolution

  • No specific vehicle or Mobile Connector repair resolution is established by the supplied verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA-hosted Tesla manufacturer communications/owner documentation reference UMC_a009, including MC-10250480, MC-10250481, MC-10250484, MC-10250485, MC-10250486, MC-10250488, MC-10250489, MC-10250490, and MC-10253666.
  • These documents describe the alert as charging interruption due to high temperature detected in the Mobile Connector charge handle.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official NHTSA-hosted Tesla documentation: https://static.nhtsa.gov/odi/tsbs/2023/MC-10250480-9999.pdf

19. Frequently asked questions

What does Tesla alert UMC_a009 mean?

It means charging was interrupted because the Mobile Connector detected a high temperature in the charge handle connected to the vehicle charge port.

What should I check for UMC_a009?

Tesla’s documented instruction is to make sure the Mobile Connector is fully inserted into the vehicle charge port and to check the charge handle and charge port for debris.

Does UMC_a009 prove that the battery or charge port has failed?

No. The supplied verified evidence does not establish a battery, charge-port, or other component failure.

20. Sources & verification

Accepted ResearchVerified
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Tesla UMC_a009: Cannot charge - Charge handle temperature high Check… | EV Diagnostics