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Ford U0140

built on or before 30-

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService is not explicitly required by the supplied evidence, but professional diagnosis is appropriate because the cited Ford communication concerns GSM software and fault codes.
Confidence95%

Quick answer

For certain 2021 Ford Mustang Mach-E vehicles in the US, DTC U0140 may be stored in the Gear Shift Module (GSM) under Ford TSB 25-2071. Ford’s supplied evidence states this may be due to GSM software.

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

Video guides

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DTC Ford U0140 Short ExplanationMaxidot

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

1. What does U0140 mean?

For certain 2021 Ford Mustang Mach-E vehicles in the US, DTC U0140 may be stored in the Gear Shift Module (GSM) under Ford TSB 25-2071. Ford’s supplied evidence states this may be due to GSM software.

2. Technical explanation

The verified NHTSA manufacturer-communication excerpt for Ford TSB 25-2071 identifies U0140 as one of several DTCs that may be stored in the Gear Shift Module (GSM). The excerpt says the condition may be due to software in the GSM. The supplied evidence does not establish the full model build-date cutoff, the exact diagnostic definition of U0140, or a specific repair procedure.

3. What system is affected?

Gear Shift Module (GSM), based on the supplied TSB evidence.

4. How serious is this code?

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

5. Symptoms you may notice

  • DTC U0140 may be stored in the Gear Shift Module (GSM).
  • The supplied TSB excerpt also mentions a message, but the message text is truncated and not fully established by the provided evidence.

6. Possible causes

  • Ford TSB 25-2071 states the condition may be due to software in the Gear Shift Module (GSM).

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Not yet established by verified evidence.

9. What you can safely do

  • Arrange diagnosis with a Ford dealer or qualified service provider and provide DTC U0140 and Ford TSB 25-2071.
  • Do not attempt high-voltage or module repair procedures based on this information.

10. Step-by-step troubleshooting

  1. Confirm whether U0140 is stored in the Gear Shift Module (GSM).
  2. Have a service provider check whether Ford TSB 25-2071 applies to the vehicle, including its build date. The supplied evidence says applicability is limited to vehicles built on or before a date that is truncated in the excerpt.

11. When to contact service

Service is not explicitly required by the supplied evidence, but professional diagnosis is appropriate because the cited Ford communication concerns GSM software and fault codes.

12. What the service center may check

  • Check the vehicle’s eligibility for Ford TSB 25-2071.
  • Confirm stored DTCs and the module in which they are stored.
  • Assess GSM software in accordance with Ford service information.

13. Possible repair or resolution

  • The supplied evidence identifies GSM software as a possible cause but does not provide a verified repair or resolution. Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Ford TSB 25-2071, published in an NHTSA manufacturer communication on 2025-03-13 (NHTSA Manufacturer Communication 11015681). The supplied excerpt states that certain vehicles may have U0140, and possibly U0100:00, U0121, and/or U0155, stored in the GSM; it says this may be due to GSM software. The excerpt states a build-date limit but truncates the exact date.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

NHTSA Manufacturer Communication 11015681, Ford TSB 25-2071: https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2025-2026.zip#nhtsa_id=11015681

19. Frequently asked questions

What does U0140 indicate on an affected 2021 Ford Mustang Mach-E?

The supplied Ford TSB evidence states that U0140 may be stored in the Gear Shift Module (GSM). It does not provide a full diagnostic definition for the code.

What may cause U0140 in this TSB?

Ford TSB 25-2071 says the condition may be due to software in the Gear Shift Module (GSM).

Does this apply to every 2021 Mustang Mach-E?

Not established. The verified applicability identifies 2021 US Ford Mustang Mach-E vehicles, while the TSB excerpt also limits coverage to vehicles built on or before a date that is truncated in the supplied evidence.

Is it safe to drive or charge?

Not yet established by verified evidence.

20. Sources & verification

ReferenceVerified
Ford U0140: built on or before 30- | EV Diagnostics