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Tesla GTW_w405

Electrical system power reduced Vehicle may shut down unexpectedly

Common search variants: GTWw405 · GTW-w405 · GTW w405 · Search ignores case and common separators.

DriveNot yet established by verified evidence. Tesla documentation warns that the vehicle may shut down unexpectedly if this alert is present while driving.
ChargeNot yet established by verified evidence.
ServiceContact Tesla Service promptly. The verified documentation identifies a possible unexpected shutdown and possible no-restart condition.
Confidence95%

Quick answer

GTW_w405 means the electrical system cannot maintain the voltage required to support all vehicle features. Tesla documentation states that, if the alert occurs while driving, the vehicle may shut down unexpectedly and may not restart after stopping.

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 GTW_w405 mean?

GTW_w405 means the electrical system cannot maintain the voltage required to support all vehicle features. Tesla documentation states that, if the alert occurs while driving, the vehicle may shut down unexpectedly and may not restart after stopping.

2. Technical explanation

This is a Tesla OEM alert, not a generic OBD code. Verified Tesla documentation submitted to NHTSA describes an inability of the electrical system to maintain the voltage required for all vehicle features. The supplied evidence does not establish the underlying failed component or a specific repair.

3. What system is affected?

Electrical system; the supplied evidence does not identify a more specific subsystem.

4. How serious is this code?

Potentially serious: Tesla documentation warns of possible unexpected vehicle shutdown while driving and possible failure to restart after stopping.

5. Symptoms you may notice

  • Electrical system power reduced alert.
  • Vehicle may shut down unexpectedly while driving.
  • Vehicle may not restart after it has stopped.

6. Possible causes

  • Not yet established by verified evidence. The verified documentation establishes insufficient electrical-system voltage support but does not identify a component-level cause.

7. Can I still drive the vehicle?

Not yet established by verified evidence. Tesla documentation warns that the vehicle may shut down unexpectedly if this alert is present while driving.

8. Can I charge the vehicle?

Not yet established by verified evidence.

9. What you can safely do

  • Arrange Tesla service promptly; do not attempt high-voltage diagnosis or repair.
  • If the alert is present while driving, recognize that Tesla documentation warns the vehicle could shut down unexpectedly.
  • Do not rely on the vehicle being able to restart after stopping, because Tesla documentation states that it may not restart.

10. Step-by-step troubleshooting

  1. No owner troubleshooting procedure is established by the supplied verified evidence.
  2. Do not perform high-voltage electrical repair or testing.

11. When to contact service

Contact Tesla Service promptly. The verified documentation identifies a possible unexpected shutdown and possible no-restart condition.

12. What the service center may check

  • Confirm the GTW_w405 alert and evaluate why the electrical system cannot maintain the voltage required to support vehicle features. Further diagnostic steps are not established by the supplied verified evidence.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Official NHTSA manufacturer communications containing this Tesla alert include MC-10253660 (published March 26, 2024), MC-10253658 (March 26, 2024), MC-10252957 (February 13, 2024), MC-10252958 (February 13, 2024), MC-10250483 (December 1, 2023), and MC-10240951 (June 9, 2023). These supplied documents provide alert/owner-documentation content; they do not establish a model-specific repair procedure in the available evidence.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified official source: NHTSA manufacturer communication PDF 10253660, published March 26, 2024: https://static.nhtsa.gov/odi/tsbs/2024/MC-10253660-9999.pdf . Applicability supplied for U.S. Tesla Model 3 (2017–2023), Model S (2012–2023), and Model X (2016–2023).

19. Frequently asked questions

What does Tesla alert GTW_w405 mean?

It means the electrical system cannot maintain the voltage required to support all vehicle features.

Can GTW_w405 cause the vehicle to stop?

Tesla documentation states that, if the alert is present while driving, the vehicle may shut down unexpectedly.

Will the vehicle restart after GTW_w405?

Tesla documentation states that it is possible the vehicle will not restart after it has stopped.

What part has failed?

Not yet established by verified evidence.

Is charging permitted?

Not yet established by verified evidence.

20. Sources & verification

Verified
Show all 24 verified sources
Tesla GTW_w405: Electrical system power reduced Vehicle may shut down… | EV Diagnostics