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Tesla CHG_u012

Power grid or vehicle issue limiting AC charging Unplug and retry / Try different charging location

Common search variants: CHGu012 · CHG-u012 · CHG u012 · Search ignores case and common separators.

DriveNot yet established by verified evidence.
ChargeAC charging is affected and charging speed is reduced. Tesla documentation states that DC fast charging/Supercharging should still function as expected.
ServiceWhether service is required is not yet established by verified evidence. If the alert persists after the documented retry and different-location steps, the supplied evidence does not provide a further verified resolution.
Confidence95%

Quick answer

CHG_u012 indicates that AC charging speed has been reduced by a condition affecting AC charging. Tesla’s documented action is to unplug and retry, or try a different charging location.

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 CHG_u012 mean?

CHG_u012 indicates that AC charging speed has been reduced by a condition affecting AC charging. Tesla’s documented action is to unplug and retry, or try a different charging location.

2. Technical explanation

Verified Tesla owner-manual material filed with NHTSA states that CHG_u012 means charging speed has been reduced due to a condition affecting the vehicle’s ability to charge with AC power. The alert identifies a possible power-grid or vehicle issue. The supplied evidence does not establish the specific fault in an individual vehicle.

3. What system is affected?

AC charging capability. DC fast charging/Supercharging is documented as expected to still function.

4. How serious is this code?

Severity is not yet established by verified evidence.

5. Symptoms you may notice

  • Reduced AC charging speed.
  • CHG_u012 alert: “Power grid or vehicle issue limiting AC charging.”

6. Possible causes

  • A power-supply disturbance is identified in the official Tesla material as a possible contributor.
  • A vehicle-related condition affecting AC charging is identified by the alert.
  • The specific 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?

AC charging is affected and charging speed is reduced. Tesla documentation states that DC fast charging/Supercharging should still function as expected.

9. What you can safely do

  • Unplug and retry AC charging.
  • Try a different charging location.
  • For Mobile Connector or Wall Connector status-light troubleshooting, refer to the applicable product Owner’s Manual at Tesla Charging & Adapter Product Guides.

10. Step-by-step troubleshooting

  1. Disconnect the AC charging connection and retry charging, as directed by the alert.
  2. Try AC charging at a different location, as directed by the alert.
  3. Use the documented distinction between locations only as an observation; it does not identify the exact cause.
  4. Consult the relevant Tesla Mobile Connector or Wall Connector Owner’s Manual for status-light troubleshooting.

11. When to contact service

Whether service is required is not yet established by verified evidence. If the alert persists after the documented retry and different-location steps, the supplied evidence does not provide a further verified resolution.

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

  • Official Tesla owner-manual content was filed with NHTSA as manufacturer communications, including MC-10253658 (published 2024-03-26), MC-10253660 (published 2024-03-26), MC-10252957 (published 2024-02-13), and MC-10250483 (published 2023-12-01). These materials document CHG_u012 and its user-facing guidance; they do not establish a repair procedure in the supplied evidence.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified NHTSA-hosted Tesla manufacturer communication: https://static.nhtsa.gov/odi/tsbs/2023/MC-10250483-9999.pdf

19. Frequently asked questions

What does Tesla CHG_u012 mean?

It means AC charging speed has been reduced because a condition affects the vehicle’s ability to charge with AC power.

What should I do when CHG_u012 appears?

Tesla’s documented guidance is to unplug and retry, or try a different charging location.

Will Supercharging still work with CHG_u012?

Tesla documentation states that DC fast charging/Supercharging should still function as expected.

Which vehicles are covered by the supplied applicability evidence?

US Tesla Model 3 (2017–2023), Model S (2012–2023), and Model X (2016–2023), subject to the supplied applicability records.

20. Sources & verification

Verified
Show all 24 verified sources
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