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Ford U0238

volt battery. Reprogram the DSP module using the latest

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService is appropriate because the verified Ford communications specify a DSP reset and module reprogramming procedure.
Confidence95%

Quick answer

For certain 2020–2021 Ford Escape and 2020–2021 Ford Mustang Mach-E vehicles in the US, DTC U0238 is covered by Ford manufacturer communications describing possible loss of communication with the digital signal processor (DSP) module. The communications identify DSP software as a possible factor and direct a DSP hard reset and DSP reprogramming with the latest software.

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 U0238 mean?

For certain 2020–2021 Ford Escape and 2020–2021 Ford Mustang Mach-E vehicles in the US, DTC U0238 is covered by Ford manufacturer communications describing possible loss of communication with the digital signal processor (DSP) module. The communications identify DSP software as a possible factor and direct a DSP hard reset and DSP reprogramming with the latest software.

2. Technical explanation

The supplied verified evidence links U0238 with no communication with the DSP module, sometimes alongside no communication with the audio control module (ACM) and/or DTCs U1084, U0237, or U0184. Ford manufacturer communications state that the condition may be due to software in the DSP. The evidence-supported service direction is to perform a hard reset of the DSP by disconnecting the 12-volt battery, followed by reprogramming the DSP with the latest software. Battery disconnection and module programming should be performed by qualified service personnel.

3. What system is affected?

Digital signal processor (DSP) module and, in the cited communications, potentially the audio control module (ACM).

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • Possible no communication with the DSP module.
  • Possible no communication with the audio control module (ACM).
  • The supplied communication excerpts refer to the instrument cluster, but the full associated instrument-cluster symptom is not established by the provided excerpts.

6. Possible causes

  • Ford manufacturer communications state that the condition may be due to software in the DSP.

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 facility.
  • Do not attempt 12-volt battery disconnection or DSP programming unless qualified and equipped to perform manufacturer service procedures.

10. Step-by-step troubleshooting

  1. Confirm the stored DTC(s), including U0238.
  2. Have qualified service personnel assess communication with the DSP and ACM as applicable.
  3. Check for the latest applicable Ford DSP software using manufacturer service information.

11. When to contact service

Service is appropriate because the verified Ford communications specify a DSP reset and module reprogramming procedure.

12. What the service center may check

  • Verify U0238 and any accompanying communication DTCs.
  • Assess communication with the DSP module and, where applicable, the ACM.
  • Perform the Ford-specified DSP hard reset procedure.
  • Reprogram the DSP module using the latest applicable software.

13. Possible repair or resolution

  • Ford communications identify a DSP hard reset and reprogramming the DSP with the latest software as the corrective direction for the described condition.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA Manufacturer Communication 10191093, SSM 49737, published April 16, 2021. It describes U0238 among possible communication DTCs and states that DSP software may be involved; it directs a DSP hard reset by disconnecting the 12-volt battery.
  • NHTSA Manufacturer Communication 10211724, SSM 50739, published May 3, 2022. It contains the same evidence-supported description of possible DSP software involvement and a DSP hard reset.
  • NHTSA Manufacturer Communication 10239099, SSM 51778, published July 7, 2023. It describes U0238 among possible communication DTCs and directs a DSP hard reset followed by DSP reprogramming using the latest software.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official NHTSA-hosted manufacturer communications: SSM 49737 (NHTSA 10191093), SSM 50739 (NHTSA 10211724), and SSM 51778 (NHTSA 10239099).

19. Frequently asked questions

What does U0238 mean in the supplied Ford evidence?

The verified communications associate U0238 with no communication with the DSP module.

Which vehicles are covered by the supplied applicability evidence?

US-market 2020–2021 Ford Escape and 2020–2021 Ford Mustang Mach-E vehicles. Applicability should still be confirmed by VIN and current Ford service information.

Is DSP software identified as a possible cause?

Yes. The Ford communications state that the condition may be due to software in the DSP.

Can I continue driving or charging?

Not yet established by verified evidence.

What repair direction is supported by the evidence?

The Ford communications direct a DSP hard reset and reprogramming the DSP with the latest software. These are service procedures for qualified personnel.

20. Sources & verification

ReferenceVerified
Ford U0238: volt battery. Reprogram the DSP module using the latest | EV Diagnostics