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Mitsubishi P1A93

CMU06 balancer abnormal, P1A94: CMU07 balancer abnormal, P1A95: CMU08 balancer abnormal, P1A96: CMU09 balancer abnormal, P1A97: CMU10 balancer abnormal, P1A98: CMU11 balancer abnor

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService involvement is appropriate because the verified procedure concerns the BMU and the main drive lithium-ion battery. The evidence does not establish urgency, driving restrictions, or charging restrictions.
Confidence95%

Quick answer

P1A93 is identified in Mitsubishi service-bulletin evidence as “CMU06 balancer abnormal.” For the applicable U.S. 2012 and 2014 Mitsubishi i-MiEV, the cited diagnostic procedure directs replacement of the Battery Management Unit (BMU) when this DTC is stored.

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 P1A93 mean?

P1A93 is identified in Mitsubishi service-bulletin evidence as “CMU06 balancer abnormal.” For the applicable U.S. 2012 and 2014 Mitsubishi i-MiEV, the cited diagnostic procedure directs replacement of the Battery Management Unit (BMU) when this DTC is stored.

2. Technical explanation

The verified Mitsubishi bulletin material lists P1A93 as a CMU06 balancer abnormal DTC. CMU refers to a cell-monitoring unit in the main drive lithium-ion battery system. In the cited procedure, after the specified diagnostic step using scan tool MB991958, a stored applicable balancer-abnormal DTC leads to BMU replacement; if the DTC is not stored, the bulletin states that the check is complete.

3. What system is affected?

Battery Management Unit (BMU) and main drive lithium-ion battery; specifically the CMU06 balancer diagnostic designation.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • A stored P1A93 diagnostic trouble code is established by the supplied evidence.
  • Other driver-visible symptoms are not yet established by verified evidence.

6. Possible causes

  • The supplied official bulletin identifies P1A93 as “CMU06 balancer abnormal.”
  • A more specific underlying cause is not yet established by verified evidence.

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

  • Have the vehicle evaluated by a Mitsubishi-qualified service facility using the applicable manufacturer diagnostic procedure.
  • Do not attempt high-voltage battery, CMU, or BMU repair yourself.

10. Step-by-step troubleshooting

  1. Use scan tool MB991958 as specified in the cited Mitsubishi diagnostic procedure to determine whether the applicable DTC is stored.
  2. If the applicable DTC is stored, the cited procedure directs replacement of the BMU.
  3. If the DTC is not stored, the cited procedure states that the check is complete.

11. When to contact service

Service involvement is appropriate because the verified procedure concerns the BMU and the main drive lithium-ion battery. The evidence does not establish urgency, driving restrictions, or charging restrictions.

12. What the service center may check

  • Confirm whether P1A93 is stored using scan tool MB991958, as specified by the bulletin procedure.
  • Follow the applicable Mitsubishi BMU/main drive lithium-ion battery diagnostic procedure.

13. Possible repair or resolution

  • For a stored P1A93 in the cited procedure, replace the Battery Management Unit (BMU).
  • If the DTC is not stored, the cited procedure states that the check is complete.

14. Affected vehicles

15. Related TSBs / service bulletins

  • TSB-19-54-004, published March 13, 2019: official NHTSA-hosted Mitsubishi manufacturer communication covering Battery Management Unit (BMU) and main drive lithium-ion battery diagnostics; its supplied evidence lists P1A93 as CMU06 balancer abnormal.
  • TSB-19-54-003, published March 13, 2019: official NHTSA-hosted Mitsubishi manufacturer communication covering Battery Management Unit (BMU) and main drive lithium-ion battery diagnostics; its supplied evidence lists P1A93 as CMU06 balancer abnormal.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified official sources: NHTSA-hosted Mitsubishi manufacturer communications TSB-19-54-004 (MC-10158409) and TSB-19-54-003 (MC-10158408), both published March 13, 2019. https://static.nhtsa.gov/odi/tsbs/2019/MC-10158409-9999.pdf ; https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf

19. Frequently asked questions

What does P1A93 mean?

Verified Mitsubishi bulletin evidence defines P1A93 as “CMU06 balancer abnormal.”

Which vehicles are established as applicable?

The supplied applicability evidence identifies U.S. Mitsubishi i-MiEV vehicles for model years 2012 and 2014.

What does the cited Mitsubishi procedure direct if P1A93 is stored?

The supplied procedure directs replacement of the BMU when the applicable DTC is stored.

Is it safe to drive or charge with P1A93?

Not yet established by verified evidence.

20. Sources & verification

Verified
Mitsubishi P1A93: CMU06 balancer abnormal, P1A94: CMU07 balancer… | EV Diagnostics