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Ford P0A71

board diagnostic module C (SOBDMC) or secondary on-board diagnostic modul

DriveUnknown. The supplied verified evidence does not establish whether driving is safe with P0A71.
ChargeUnknown. The supplied verified evidence does not establish whether charging is safe with P0A71.
ServiceService need is not established by the supplied diagnostic record. However, qualified Ford service evaluation is appropriate because the verified communication associates P0A71 with the secondary on-board diagnostic module C or secondary on-board diagnostic module.
Confidence95%

Quick answer

For certain 2020–2021 US Ford Escape and Mustang Mach-E vehicles, DTC P0A71 is associated with the secondary on-board diagnostic module C (SOBDMC) or secondary on-board diagnostic module, based on Ford/NHTSA communication SSM 50151.

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 P0A71 mean?

For certain 2020–2021 US Ford Escape and Mustang Mach-E vehicles, DTC P0A71 is associated with the secondary on-board diagnostic module C (SOBDMC) or secondary on-board diagnostic module, based on Ford/NHTSA communication SSM 50151.

2. Technical explanation

The verified diagnostic title and meaning identify P0A71 as relating to the board diagnostic module C (SOBDMC) or secondary on-board diagnostic module. NHTSA Manufacturer Communication 10201604, Ford SSM 50151, lists P0A71 among DTCs that may be set by the SOBDMC or secondary on-board diagnostic module. The supplied evidence does not establish a specific failed part, diagnostic procedure, or repair.

3. What system is affected?

Secondary on-board diagnostic module C (SOBDMC) or secondary on-board diagnostic module.

4. How serious is this code?

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

5. Symptoms you may notice

  • A warning message in the instrument panel cluster (IPC) is mentioned in Ford SSM 50151 evidence.
  • No other symptoms are established by the supplied verified evidence.

6. Possible causes

  • Not yet established by verified evidence.

7. Can I still drive the vehicle?

Unknown. The supplied verified evidence does not establish whether driving is safe with P0A71.

8. Can I charge the vehicle?

Unknown. The supplied verified evidence does not establish whether charging is safe with P0A71.

9. What you can safely do

  • Record the exact instrument-panel warning message, if present.
  • Have the vehicle evaluated by a qualified Ford service facility or technician.
  • Do not attempt high-voltage component diagnosis or repair based on this code alone.

10. Step-by-step troubleshooting

  1. Confirm P0A71 with an appropriate diagnostic scan tool.
  2. Check for any additional stored DTCs and retain the complete code report.
  3. Use Ford service information applicable to the vehicle’s VIN and configuration. Further test steps are not established by the supplied verified evidence.

11. When to contact service

Service need is not established by the supplied diagnostic record. However, qualified Ford service evaluation is appropriate because the verified communication associates P0A71 with the secondary on-board diagnostic module C or secondary on-board diagnostic module.

12. What the service center may check

  • Confirm whether the vehicle is a 2020–2021 US Ford Escape or Mustang Mach-E.
  • Retrieve all diagnostic trouble codes, including P0A71, and review instrument-panel messages.
  • Refer to Ford SSM 50151 and current VIN-specific Ford service information. Specific inspection steps are not established by the supplied verified evidence.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Ford SSM 50151, published September 24, 2021, is recorded by NHTSA as Manufacturer Communication 10201604. The supplied summary lists P0A71 among codes that may be set by the SOBDMC or secondary on-board diagnostic module. The complete repair direction is not included in the supplied evidence.

16. Recall information

  • No recall is established by the supplied verified evidence.

17. Official manufacturer information

NHTSA Manufacturer Communication 10201604 — Ford SSM 50151, published 2021-09-24: https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2020-2024.zip#nhtsa_id=10201604

19. Frequently asked questions

What does Ford code P0A71 mean?

The verified diagnostic record identifies it as relating to board diagnostic module C (SOBDMC) or the secondary on-board diagnostic module.

Which vehicles are covered by the supplied applicability evidence?

2020–2021 Ford Escape and 2020–2021 Ford Mustang Mach-E vehicles in the US.

Is it safe to drive or charge with P0A71?

Not yet established by verified evidence.

Does P0A71 identify a specific failed component?

No. The supplied evidence links the code to the SOBDMC or secondary on-board diagnostic module but does not establish a specific failed component.

20. Sources & verification

ReferenceVerified
Ford P0A71: board diagnostic module C (SOBDMC) or secondary on-board… | EV Diagnostics