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Tesla UMC_w016

Mobile Connector control box temperature high Maximum charge rate reduced

Common search variants: UMCw016 · UMC-w016 · UMC w016 · Search ignores case and common separators.

DriveNot yet established by verified evidence.
ChargeCharging can continue at a temporarily reduced current according to the alert description. Whether charging is otherwise safe or appropriate is not yet established by verified evidence.
ServiceService need is not yet established by verified evidence.
Confidence95%

Quick answer

Tesla alert UMC_w016 means the Mobile Connector detected increased temperature inside its control-box housing and has temporarily reduced charge current.

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_w016 mean?

Tesla alert UMC_w016 means the Mobile Connector detected increased temperature inside its control-box housing and has temporarily reduced charge current.

2. Technical explanation

The alert concerns the Tesla Mobile Connector control box, not a vehicle fault diagnosis. Verified Tesla owner-documentation communications state that charging current is temporarily reduced when increased temperature is detected inside the Mobile Connector control-box housing.

3. What system is affected?

Tesla Mobile Connector control box and its charging-current reduction function.

4. How serious is this code?

Severity is not yet established by verified evidence. The verified consequence is a temporary reduction in charging current.

5. Symptoms you may notice

  • UMC_w016 alert: “Mobile Connector control box temperature high Maximum charge rate reduced.”
  • Charging current is temporarily reduced.

6. Possible causes

  • The Mobile Connector detected increased temperature inside its control-box housing.
  • The official guidance identifies a covered Mobile Connector or a nearby heat source as conditions to check. Any further cause 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 can continue at a temporarily reduced current according to the alert description. Whether charging is otherwise safe or appropriate is not yet established by verified evidence.

9. What you can safely do

  • Make sure the Mobile Connector is not covered by anything.
  • Make sure there is no heat source nearby.
  • For Mobile Connector status-light and charging-issue troubleshooting, refer to the product owner’s manual.

10. Step-by-step troubleshooting

  1. Confirm that the Mobile Connector control box is uncovered.
  2. Check for a nearby heat source, as stated in Tesla’s guidance.
  3. Consult the Mobile Connector owner’s manual for status-light and charging-issue troubleshooting.

11. When to contact service

Service need is not yet established by verified evidence.

12. What the service center may check

  • Not yet established by verified evidence.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA manufacturer communications containing Tesla owner-documentation guidance for UMC_w016 include MC-10253660 (published March 26, 2024), MC-10253658 (March 26, 2024), MC-10252957 (February 13, 2024), MC-10252958 (February 13, 2024), MC-10251060 (January 28, 2024), MC-10250483 (December 1, 2023), and other supplied owner-documentation communications. The verified guidance is to ensure the Mobile Connector is uncovered and away from heat sources.

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/2023/MC-10250483-9999.pdf

19. Frequently asked questions

What does Tesla UMC_w016 mean?

It means the Mobile Connector detected increased temperature inside its control-box housing, so charge current has been temporarily reduced.

What should I do for UMC_w016?

Make sure the Mobile Connector is not covered and that no heat source is nearby. Consult the product owner’s manual for status-light and charging troubleshooting.

Does UMC_w016 confirm a failed part?

No component failure or repair is established by the verified evidence.

20. Sources & verification

Verified
Show all 24 verified sources
Tesla UMC_w016: Mobile Connector control box temperature high Maximum… | EV Diagnostics