Verified EV diagnostic knowledge page

Chevrolet U0401

G111 and/or G112 may not be properly torqued. Correction: Inspect G111 and G11

DriveUnknown. Because the verified communication reports that a stall may occur, have the vehicle assessed by Chevrolet service rather than relying on an unverified driveability determination.
ChargeUnknown. The supplied verified evidence does not address charging capability or charging safety.
ServiceContact a Chevrolet dealer or qualified service facility, particularly if the vehicle has stalled, will not start, or produces a clicking starter when the Start button is pressed.
Confidence95%

Quick answer

For a 2025 Chevrolet Equinox in the U.S., DTC U0401 is listed in GM/NHTSA communication PIT6282A in connection with G111 and/or G112 possibly not being properly torqued. The stated correction is to inspect G111 and G112.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

Video guides

Watch Videos

Relevant videos play here without leaving this diagnostic page.

No sufficiently relevant embeddable video has been accepted for this diagnostic yet.

Videos are supporting material and never override OEM or regulator evidence.

1. What does U0401 mean?

For a 2025 Chevrolet Equinox in the U.S., DTC U0401 is listed in GM/NHTSA communication PIT6282A in connection with G111 and/or G112 possibly not being properly torqued. The stated correction is to inspect G111 and G112.

2. Technical explanation

Verified evidence links U0401 to a condition in which G111 and/or G112 may not be properly torqued. The official communication identifies inspection of G111 and G112 as the correction. It does not establish a broader generic definition of U0401 for this vehicle beyond this communication.

3. What system is affected?

Not yet established by verified evidence. The verified communication refers to G111 and G112 but does not identify the system name in the supplied evidence.

4. How serious is this code?

Unknown. The supplied verified evidence does not assign a severity level.

5. Symptoms you may notice

  • A stall may occur.
  • A no-start condition may occur.
  • A clicking starter may be heard when the Start button is pressed.

6. Possible causes

  • G111 and/or G112 may not be properly torqued.

7. Can I still drive the vehicle?

Unknown. Because the verified communication reports that a stall may occur, have the vehicle assessed by Chevrolet service rather than relying on an unverified driveability determination.

8. Can I charge the vehicle?

Unknown. The supplied verified evidence does not address charging capability or charging safety.

9. What you can safely do

  • If the vehicle stalls or does not start, arrange assessment by a Chevrolet dealer or qualified service facility.
  • Do not attempt high-voltage or electrical-ground repairs without appropriate trained service personnel.
  • Provide the service facility with DTC U0401 and reference GM/NHTSA manufacturer communication PIT6282A.

10. Step-by-step troubleshooting

  1. Confirm whether U0401 is stored.
  2. Check for the other DTCs listed in PIT6282A.
  3. Have trained service personnel inspect G111 and G112 as directed by the official communication.

11. When to contact service

Contact a Chevrolet dealer or qualified service facility, particularly if the vehicle has stalled, will not start, or produces a clicking starter when the Start button is pressed.

12. What the service center may check

  • Inspect G111 and G112 for proper torque, as specified by PIT6282A.
  • Evaluate the condition in the context of any accompanying DTCs listed in PIT6282A.

13. Possible repair or resolution

  • The official communication states the correction is to inspect G111 and G112.
  • Any further repair procedure or final resolution is not yet established by the supplied verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • PIT6282A, NHTSA Manufacturer Communication PDF 11011319, published November 18, 2024. It applies in the supplied data to the 2025 Chevrolet Equinox in the U.S. and identifies U0401 among DTCs that may be present with a stall or no-start/clicking-starter condition.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official source: NHTSA Manufacturer Communication PDF 11011319, PIT6282A: https://static.nhtsa.gov/odi/tsbs/2024/MC-11011319-0001.pdf

19. Frequently asked questions

What does U0401 mean on the applicable 2025 Chevrolet Equinox?

In the supplied official communication, U0401 is associated with G111 and/or G112 possibly not being properly torqued. The communication directs inspection of G111 and G112.

Can U0401 cause a no-start?

PIT6282A states that affected vehicles may experience a no-start with a clicking starter when the Start button is pressed, and U0401 may be present.

Can U0401 be associated with a stall?

Yes. PIT6282A states that affected vehicles may experience a stall, and U0401 may be present.

Is this a recall?

The supplied verified evidence identifies an official manufacturer communication/TSB, not a recall.

20. Sources & verification

ReferenceVerified
Chevrolet U0401: G111 and/or G112 may not be properly torqued.… | EV Diagnostics