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Mitsubishi P1AFC

Replace the BMU. Then go to Step 12. NO : The diagnosis is complete. STEP 12. Check whether the DTC is stored again Check again if the DTC is stored in the EV-ECU. (1) Erase the st

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence. Official confirmation testing specifically calls for connecting the quick-charging gun or connector after clearing the DTC.
ServiceContact a Mitsubishi dealer or qualified EV repair facility for diagnosis and any BMU replacement.
Confidence95%

Quick answer

For verified 2012, 2014, and 2016 US Mitsubishi i-MiEV applicability, official Mitsubishi diagnostic material directs BMU replacement if P1AFC remains stored at the specified diagnostic decision point, followed by confirmation testing.

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 P1AFC mean?

For verified 2012, 2014, and 2016 US Mitsubishi i-MiEV applicability, official Mitsubishi diagnostic material directs BMU replacement if P1AFC remains stored at the specified diagnostic decision point, followed by confirmation testing.

2. Technical explanation

Verified evidence identifies P1AFC only through a manufacturer diagnostic procedure rather than a complete plain-language DTC definition. In that procedure, if P1AFC is stored at the referenced check, the instruction is to replace the BMU (Battery Management Unit), then perform a post-repair confirmation: erase the stored DTC, connect the quick-charging gun, and check the EV-ECU again. If P1AFC is stored again, return to the start of the diagnostic procedure; if not, the diagnosis is complete. The supplied evidence does not establish the initiating fault condition or a complete diagnostic path before the BMU-replacement decision point.

3. What system is affected?

BMU (Battery Management Unit) and EV-ECU diagnostic communication are explicitly referenced. The confirmation procedure also uses the quick-charging gun/connector. The full affected system is not yet established by verified evidence.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

Not yet established by verified evidence.

6. Possible causes

  • The official diagnostic evidence directs BMU replacement when P1AFC remains stored at a specified decision point.
  • The supplied evidence does not establish a complete root-cause list for P1AFC.

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. Official confirmation testing specifically calls for connecting the quick-charging gun or connector after clearing the DTC.

9. What you can safely do

  • Have the vehicle assessed using the applicable Mitsubishi diagnostic procedure.
  • Do not attempt BMU replacement or high-voltage-system repair without qualified EV service training and equipment.
  • Record whether the code returns after professional diagnostic confirmation.

10. Step-by-step troubleshooting

  1. Official procedure excerpt: check whether P1AFC is stored in the EV-ECU at the referenced diagnostic step.
  2. If it is stored, the procedure directs replacement of the BMU and then post-repair confirmation testing.
  3. Post-repair confirmation: erase the stored DTC, connect the quick-charging gun, and check whether P1AFC is stored again.
  4. If P1AFC is stored again, return to Step 1 of the applicable official diagnostic procedure. If it is not stored again, the diagnosis is complete.
  5. A supplied official bulletin cautions that CAN-bus problems can cause an incorrect DTC to be stored and states that CAN-bus lines should be diagnosed before that bulletin’s diagnosis. Whether that caution specifically applies to P1AFC is not yet established by the supplied excerpt.

11. When to contact service

Contact a Mitsubishi dealer or qualified EV repair facility for diagnosis and any BMU replacement.

12. What the service center may check

  • Check P1AFC status in the EV-ECU using the applicable manufacturer procedure.
  • Perform the manufacturer-directed post-repair DTC-clear and quick-charge-connector confirmation check.
  • If the code returns, resume the official procedure from Step 1.
  • Evaluate CAN-bus lines where required by the applicable official procedure.

13. Possible repair or resolution

  • At the specified decision point in the official diagnostic procedure, replace the BMU.
  • After replacement, erase the DTC and perform the official quick-charging confirmation check.
  • If P1AFC does not return during that confirmation, the procedure states that diagnosis is complete.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Mitsubishi TSB-19-54-003, published March 13, 2019; NHTSA manufacturer communication MC-10158408: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf
  • Mitsubishi TSB-19-54-004, published March 13, 2019; NHTSA manufacturer communication MC-10158409: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158409-9999.pdf
  • Mitsubishi TSB-19-54-005, published March 13, 2019; NHTSA manufacturer communication MC-10158410: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158410-9999.pdf

16. Recall information

No recall relationship is established by verified evidence.

17. Official manufacturer information

Verified applicability: US-market Mitsubishi i-MiEV model years 2012, 2014, and 2016. Evidence is from NHTSA-hosted Mitsubishi manufacturer communications published March 13, 2019. No recall information was supplied.

19. Frequently asked questions

What does P1AFC mean?

A complete plain-language meaning is not yet established by verified evidence. The supplied official material provides a diagnostic decision path that can direct BMU replacement.

What does the official procedure direct if P1AFC remains stored at its decision point?

Replace the BMU, then perform the post-repair confirmation procedure.

How is repair confirmation performed in the supplied procedure?

Erase the stored DTC, connect the quick-charging gun, and check whether P1AFC is stored again in the EV-ECU. If it returns, resume the procedure from Step 1; if it does not return, the diagnosis is complete.

Which vehicles are verified in the supplied applicability data?

US-market Mitsubishi i-MiEV for model years 2012, 2014, and 2016.

20. Sources & verification

Verified
Mitsubishi P1AFC: Replace the BMU. Then go to Step 12. NO : The… | EV Diagnostics