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Ford P1A10

Proceed to step 25. No – Proceed to step 28. 25. From the list on the LH side of the screen, select the SOBDMC. 26. From the list on the RH side of the screen, select SOBDMC - Rese

DriveNot yet established by verified evidence. The supplied diagnostic record lists safe-to-drive status as unknown.
ChargeNot yet established by verified evidence. The supplied diagnostic record lists safe-to-charge status as unknown.
ServiceService need is not explicitly established by the supplied diagnostic record, which lists service-required status as unknown. However, the verified Ford procedure requires diagnostic-tool operations and should be performed by a Ford dealer or qualified technician.
Confidence95%

Quick answer

For a 2021–2022 Ford Mustang Mach-E in the US, P1A10 is documented by Ford in an official communication as a DTC that may be present in the Secondary On-Board Diagnostic Module C (SOBDMC), including after a low-voltage service disconnect event. Ford’s documented procedure includes clearing and retesting DTCs and, if P1A10 and U101E remain present, running an SOBDMC reset using the specified diagnostic tool procedure.

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 P1A10 mean?

For a 2021–2022 Ford Mustang Mach-E in the US, P1A10 is documented by Ford in an official communication as a DTC that may be present in the Secondary On-Board Diagnostic Module C (SOBDMC), including after a low-voltage service disconnect event. Ford’s documented procedure includes clearing and retesting DTCs and, if P1A10 and U101E remain present, running an SOBDMC reset using the specified diagnostic tool procedure.

2. Technical explanation

The supplied verified evidence does not provide a conventional descriptive definition for P1A10. The diagnostic title/meaning supplied is procedural text rather than a fault description. Ford communication SSM 51095 states that some 2021–2022 Mustang Mach-E vehicles may have P1A10 stored in the SOBDMC and U3012 stored in the Battery Energy Control Module (BECM) after a low-voltage service disconnect event. Ford communication 21P22-S1 documents a diagnostic workflow: clear DTCs in all modules, retest, and determine whether P1A10 and U101E remain. If both remain, select the SOBDMC and run the diagnostic-tool function to reset the SOBDMC, following all on-screen instructions carefully.

3. What system is affected?

Verified evidence identifies P1A10 as being in the Secondary On-Board Diagnostic Module C (SOBDMC). SSM 51095 also references the Battery Energy Control Module (BECM) for companion code U3012.

4. How serious is this code?

Not yet established by verified evidence. The supplied diagnostic record lists severity as unknown.

5. Symptoms you may notice

  • P1A10 may be stored in the SOBDMC after a low-voltage service disconnect event on vehicles covered by Ford SSM 51095.
  • No driver-visible symptoms are established by the supplied verified evidence.

6. Possible causes

  • A low-voltage service disconnect event is identified in Ford SSM 51095 as a condition after which P1A10 may be present in the SOBDMC.
  • No further cause is established by the supplied verified evidence.

7. Can I still drive the vehicle?

Not yet established by verified evidence. The supplied diagnostic record lists safe-to-drive status as unknown.

8. Can I charge the vehicle?

Not yet established by verified evidence. The supplied diagnostic record lists safe-to-charge status as unknown.

9. What you can safely do

  • Arrange diagnosis by a Ford dealer or qualified technician if P1A10 is present.
  • Provide the technician with the stored DTCs and note whether a low-voltage service disconnect event occurred.
  • Do not attempt high-voltage-system repair procedures yourself.

10. Step-by-step troubleshooting

  1. Ford communication 21P22-S1 directs use of the specified diagnostic tool to run a self-test and clear DTCs in all modules.
  2. After clearing DTCs, Ford directs a retest to determine whether P1A10 and U101E are still present.
  3. If P1A10 and U101E remain present, Ford directs the technician to select SOBDMC and run the ‘Reset the Secondary On-Board Diagnostic Control Module C (SOBDMC)’ function, following on-screen instructions carefully.

11. When to contact service

Service need is not explicitly established by the supplied diagnostic record, which lists service-required status as unknown. However, the verified Ford procedure requires diagnostic-tool operations and should be performed by a Ford dealer or qualified technician.

12. What the service center may check

  • Check DTCs in all modules using the applicable Ford diagnostic tool.
  • Run the applicable self-test.
  • Clear DTCs and retest for P1A10 and U101E.
  • If P1A10 and U101E remain, run the documented SOBDMC reset function.

13. Possible repair or resolution

  • The supplied evidence documents an SOBDMC reset procedure when P1A10 and U101E remain after clearing and retesting.
  • Whether this resolves every instance of P1A10 is not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Ford SSM 51095, published September 22, 2022: Some 2021–2022 Mustang Mach-E vehicles, as well as certain 2022 F-150 Lightning and E-Transit vehicles, may have P1A10 in SOBDMC and U3012 in BECM after a low-voltage service disconnect event.
  • Ford 21P22-S1, published March 28, 2022: Documents a diagnostic workflow that includes clearing and retesting DTCs and resetting SOBDMC if P1A10 and U101E remain present.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified official sources: NHTSA-hosted Ford manufacturer communications SSM 51095 (NHTSA ID 10222067) and 21P22-S1 (NHTSA ID 10209373).

19. Frequently asked questions

What does P1A10 mean on a Ford Mustang Mach-E?

The supplied verified evidence identifies P1A10 as a DTC stored in the Secondary On-Board Diagnostic Module C (SOBDMC). It does not establish a conventional descriptive fault definition.

Can a low-voltage service disconnect be related to P1A10?

Yes. Ford SSM 51095 states that P1A10 may be present in SOBDMC after a low-voltage service disconnect event on covered vehicles.

What does Ford’s documented procedure do if P1A10 remains?

Ford’s 21P22-S1 procedure calls for clearing and retesting DTCs. If P1A10 and U101E remain, it directs the technician to reset SOBDMC with the specified diagnostic-tool function.

Is it safe to drive or charge with P1A10?

Not yet established by verified evidence. The supplied diagnostic record marks both statuses as unknown.

20. Sources & verification

Verified
Ford P1A10: Proceed to step 25. No – Proceed to step 28. 25. From the… | EV Diagnostics