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Ford P0021

14 of the Workshop

DriveUnknown. The supplied diagnostic record lists safe-to-drive status as unknown.
ChargeUnknown. The supplied diagnostic record lists safe-to-charge status as unknown.
ServiceService need is listed as unknown in the supplied diagnostic record. However, Ford’s official communication directs technician diagnosis through Pinpoint Test HK in PC/ED or Workshop Manual Section 303-14; a Ford-qualified service provider can follow that procedure.
Confidence95%

Quick answer

For applicable 2015–2021 US Ford C-MAX, Escape, Focus, and Fusion vehicles, verified Ford/NHTSA communication SSM 54366 identifies P0021 as a code that may appear with an illuminated malfunction indicator lamp (MIL). It directs technicians to Pinpoint Test HK in the Powertrain Control/Emissions Diagnosis (PC/ED) information or Workshop Manual Section 303-14.

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 P0021 mean?

For applicable 2015–2021 US Ford C-MAX, Escape, Focus, and Fusion vehicles, verified Ford/NHTSA communication SSM 54366 identifies P0021 as a code that may appear with an illuminated malfunction indicator lamp (MIL). It directs technicians to Pinpoint Test HK in the Powertrain Control/Emissions Diagnosis (PC/ED) information or Workshop Manual Section 303-14.

2. Technical explanation

The supplied verified evidence defines the diagnostic title and meaning only as “P0021 — 14 of the Workshop” and “14 of the Workshop.” The official communication does not provide a plain-language component definition, diagnostic threshold, root cause, or repair procedure in the supplied evidence. It does establish that P0021 can occur with an illuminated MIL and that Ford directs diagnosis through Pinpoint Test HK in PC/ED or Workshop Manual Section 303-14.

3. What system is affected?

Not yet established by verified evidence. The official communication refers to the Powertrain Control and Emissions Diagnosis (PC/ED) information and Workshop Manual Section 303-14.

4. How serious is this code?

Unknown. The supplied diagnostic record lists severity as unknown.

5. Symptoms you may notice

  • Illuminated malfunction indicator lamp (MIL).

6. Possible causes

  • Not yet established by verified evidence.

7. Can I still drive the vehicle?

Unknown. The supplied diagnostic record lists safe-to-drive status as unknown.

8. Can I charge the vehicle?

Unknown. The supplied diagnostic record lists safe-to-charge status as unknown.

9. What you can safely do

  • Record the stored diagnostic trouble codes and the MIL condition.
  • Arrange diagnosis using Ford’s specified Pinpoint Test HK in PC/ED or Workshop Manual Section 303-14.
  • Do not assume a cause or perform component replacement based on P0021 alone.

10. Step-by-step troubleshooting

  1. Use Pinpoint Test HK in Ford Powertrain Control and Emissions Diagnosis (PC/ED) information.
  2. Alternatively, use Workshop Manual Section 303-14 as directed by Ford communication SSM 54366.
  3. No further diagnostic steps are established by the supplied verified evidence.

11. When to contact service

Service need is listed as unknown in the supplied diagnostic record. However, Ford’s official communication directs technician diagnosis through Pinpoint Test HK in PC/ED or Workshop Manual Section 303-14; a Ford-qualified service provider can follow that procedure.

12. What the service center may check

  • Confirm P0021 and any accompanying stored DTCs.
  • Follow Pinpoint Test HK in PC/ED or Workshop Manual Section 303-14.
  • The supplied evidence does not establish additional inspection or test items.

13. Possible repair or resolution

  • Not yet established by verified evidence. The supplied communication provides a diagnostic reference, not a documented repair outcome.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA Manufacturer Communication 11025611, Ford SSM 54366, published November 12, 2025. It states that certain Ford and Lincoln vehicles may exhibit an illuminated MIL with P0011, P0012, P0014, P0015, P0016, P0017, P0018, P0019, P0021, P0022, P0024, and/or P0025, and directs use of Pinpoint Test HK in PC/ED or Workshop Manual Section 303-14.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified source: NHTSA Manufacturer Communication 11025611, Ford SSM 54366, published 2025-11-12. https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2025-2026.zip#nhtsa_id=11025611

19. Frequently asked questions

What does P0021 mean on an applicable Ford vehicle?

The supplied diagnostic record labels it “P0021 — 14 of the Workshop” with the meaning “14 of the Workshop.” A clearer technical definition is not established by the supplied verified evidence.

What symptom is verified for P0021?

The official Ford/NHTSA communication states that P0021 may be present with an illuminated malfunction indicator lamp (MIL).

Which vehicles are covered by the supplied applicability data?

US-market 2015–2021 Ford C-MAX, Escape, Focus, and Fusion vehicles are listed in the supplied applicability data.

Can I drive or charge with P0021?

Not established. The supplied diagnostic record marks both safe-to-drive and safe-to-charge status as unknown.

What does Ford direct technicians to do?

Ford SSM 54366 directs technicians to Pinpoint Test HK in Powertrain Control and Emissions Diagnosis (PC/ED) information or Workshop Manual Section 303-14.

20. Sources & verification

ReferenceVerified
Ford P0021: 14 of the Workshop | EV Diagnostics