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Tesla UMC_w008

Unable to charge - Wall plug temperature high Wall outlet and wiring inspection recommended

Common search variants: UMCw008 · UMC-w008 · UMC w008 · Search ignores case and common separators.

DriveNot yet established by verified evidence.
ChargeCharging has stopped in response to the detected high temperature. Whether charging can safely resume is not yet established by verified evidence.
ServiceContact a qualified electrical professional for inspection of the wall outlet and wiring. Tesla service need is not yet established by verified evidence.
Confidence95%

Quick answer

UMC_w008 means the Tesla Mobile Connector detected that the wall outlet/plug area was becoming too warm and stopped charging to protect the outlet. Tesla’s documented recommendation is wall-outlet and wiring inspection.

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_w008 mean?

UMC_w008 means the Tesla Mobile Connector detected that the wall outlet/plug area was becoming too warm and stopped charging to protect the outlet. Tesla’s documented recommendation is wall-outlet and wiring inspection.

2. Technical explanation

Verified Tesla owner-manual material filed with NHTSA states that a high-temperature alert from the Mobile Connector means the outlet used for charging is becoming too warm, so charging has stopped to protect the outlet. The same material states this does not indicate a problem with the Mobile Connector or vehicle, but it does indicate that the wall outlet and wiring should be inspected.

3. What system is affected?

AC charging supply equipment: the wall outlet/plug and associated wiring used with the Tesla Mobile Connector.

4. How serious is this code?

The diagnostic record lists severity as unknown. Verified documentation confirms charging stopped to protect the outlet.

5. Symptoms you may notice

  • Tesla alert: “Unable to charge - Wall plug temperature high Wall outlet and wiring inspection recommended.”
  • Charging stops when the Mobile Connector detects high temperature at the outlet/plug area.

6. Possible causes

  • The outlet used for charging is becoming too warm.
  • The verified documentation recommends inspection of the wall outlet and wiring. A specific underlying electrical defect 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 has stopped in response to the detected high temperature. Whether charging can safely resume is not yet established by verified evidence.

9. What you can safely do

  • Do not continue relying on the affected wall outlet for Mobile Connector charging until the outlet and wiring have been inspected.
  • Use a Tesla Supercharger or Destination Charging location if available; Tesla documentation states these can be located through the vehicle touchscreen map.
  • Refer to the applicable Mobile Connector owner’s manual for status-light and charging-issue troubleshooting.

10. Step-by-step troubleshooting

  1. Have the wall outlet and its wiring inspected, as recommended in the alert.
  2. Consult the Mobile Connector owner’s manual for troubleshooting of Mobile Connector status lights and charging issues.

11. When to contact service

Contact a qualified electrical professional for inspection of the wall outlet and wiring. Tesla service need is not yet established by verified evidence.

12. What the service center may check

  • Inspect the wall outlet used for charging.
  • Inspect the wiring associated with that outlet.

13. Possible repair or resolution

  • Not yet established by verified evidence. The verified material recommends outlet and wiring inspection but does not specify a repair.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA Manufacturer Communication PDF 10253658: Index373 (published 2024-03-26): https://static.nhtsa.gov/odi/tsbs/2024/MC-10253658-9999.pdf
  • NHTSA Manufacturer Communication PDF 10253660: Index381 (published 2024-03-26): https://static.nhtsa.gov/odi/tsbs/2024/MC-10253660-9999.pdf
  • NHTSA Manufacturer Communication PDF 10250483: ManualC (published 2023-12-01): https://static.nhtsa.gov/odi/tsbs/2023/MC-10250483-9999.pdf

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Tesla owner-manual content submitted to NHTSA documents UMC_w008 and explains that the outlet is becoming too warm, charging stops to protect it, and the wall outlet and wiring should be inspected. Verified applicability: US Tesla Model 3 (2017–2023), Model S (2012–2023), and Model X (2016–2023).

19. Frequently asked questions

Does UMC_w008 mean the vehicle or Mobile Connector has failed?

No. The verified Tesla documentation states that this alert does not indicate an issue with the Mobile Connector or vehicle; it indicates the outlet used to charge is becoming too warm.

Why did charging stop?

Tesla documentation states charging stopped to protect the outlet after the Mobile Connector detected high temperature.

What should be inspected?

The wall outlet and wiring should be inspected, according to the alert and verified Tesla documentation.

Which vehicles are verified as applicable?

Verified US applicability includes Model 3 model years 2017–2023, Model S model years 2012–2023, and Model X model years 2016–2023.

20. Sources & verification

Verified
Show all 24 verified sources
Tesla UMC_w008: Unable to charge - Wall plug temperature high Wall… | EV Diagnostics