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Tesla CHG_u002

Charging stopped due to large voltage drop Remove extension cords / Have wiring inspected

Common search variants: CHGu002 · CHG-u002 · CHG u002 · Search ignores case and common separators.

DriveNot yet established by verified evidence.
ChargeThe current charging session has been interrupted. Whether charging can continue after removing an extension cord or after electrical inspection is not yet established by verified evidence.
ServiceContact a qualified person to inspect the building wiring and/or wall outlet. Whether Tesla service is required is not yet established by verified evidence.
Confidence95%

Quick answer

CHG_u002 means charging was interrupted because the vehicle’s onboard charger detected an unusually large voltage drop. Tesla’s documented guidance is to remove extension cords and have the building wiring and/or wall outlet inspected.

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_u002 mean?

CHG_u002 means charging was interrupted because the vehicle’s onboard charger detected an unusually large voltage drop. Tesla’s documented guidance is to remove extension cords and have the building wiring and/or wall outlet inspected.

2. Technical explanation

The verified Tesla documentation identifies CHG_u002 as: “Charging stopped due to large voltage drop Remove extension cords / Have wiring inspected.” It states that charging has been interrupted because the onboard charger detected an unusually large voltage drop. This evidence does not establish a vehicle component failure.

3. What system is affected?

The AC charging power supply path, including the building wiring, wall outlet, and any extension cord used with charging equipment. The alert is detected by the vehicle’s onboard charger.

4. How serious is this code?

Severity is not yet established by verified evidence. The alert stops charging; therefore, charging availability is affected.

5. Symptoms you may notice

  • Charging is interrupted.
  • The vehicle displays the CHG_u002 alert.
  • An unusually large voltage drop is detected by the onboard charger.

6. Possible causes

  • Problems with the building wiring and/or wall outlet.
  • Use of an extension cord.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

The current charging session has been interrupted. Whether charging can continue after removing an extension cord or after electrical inspection is not yet established by verified evidence.

9. What you can safely do

  • Remove any extension cord from the charging setup.
  • Have the building wiring and/or wall outlet inspected.
  • For Mobile Connector or Wall Connector status-light troubleshooting, consult the applicable product Owner’s Manual at Tesla Charging & Adapter Product Guides.

10. Step-by-step troubleshooting

  1. Do not use an extension cord in the charging setup.
  2. Arrange inspection of the building wiring and/or wall outlet.
  3. Refer to the relevant Tesla Mobile Connector or Wall Connector Owner’s Manual for status-light troubleshooting.

11. When to contact service

Contact a qualified person to inspect the building wiring and/or wall outlet. Whether Tesla service is required is not yet established by verified evidence.

12. What the service center may check

  • Inspect the building wiring.
  • Inspect the wall outlet.
  • Evaluate whether an extension cord is being used in the charging setup.

13. Possible repair or resolution

  • Remove the extension cord.
  • Correct any issue identified with the building wiring and/or wall outlet. The specific repair is not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA Manufacturer Communication PDF 10250483, published December 1, 2023: https://static.nhtsa.gov/odi/tsbs/2023/MC-10250483-9999.pdf
  • NHTSA Manufacturer Communication PDF 10253658, published March 26, 2024: https://static.nhtsa.gov/odi/tsbs/2024/MC-10253658-9999.pdf

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified NHTSA-hosted Tesla manufacturer communications document this alert for US Tesla Model 3 (2017–2023), Model S (2012–2023), and Model X (2016–2023), subject to the supplied applicability records. Official source: https://static.nhtsa.gov/odi/tsbs/2023/MC-10250483-9999.pdf

19. Frequently asked questions

What does Tesla CHG_u002 mean?

It means charging was interrupted because the onboard charger detected an unusually large voltage drop.

Can an extension cord trigger CHG_u002?

Tesla documentation lists an extension cord as a likely cause and directs the user to remove extension cords.

What should be inspected after CHG_u002?

Tesla documentation identifies the building wiring and/or wall outlet for inspection.

Does CHG_u002 prove the vehicle has a fault?

No. The verified evidence identifies external electrical supply conditions as likely causes; it does not establish a vehicle component failure.

20. Sources & verification

Verified
Show all 24 verified sources
Tesla CHG_u002: Charging stopped due to large voltage drop Remove… | EV Diagnostics