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Mitsubishi P1A82

CMU01 module temperature sensor abnormal, P1A83: CMU02 module temperature sensor abnormal, P1A84: CMU03 module temperature sensor abnormal, P1A85: CMU04 module temperature sensor a

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Mitsubishi dealer or qualified EV service provider for diagnosis, particularly because the affected system is the main drive lithium-ion battery and BMU.
Confidence95%

Quick answer

P1A82 is a Mitsubishi i-MiEV battery-management diagnostic trouble code for an abnormal CMU01 module temperature sensor. Verified applicability is limited to US-market 2012, 2014, and 2016 i-MiEV vehicles.

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 P1A82 mean?

P1A82 is a Mitsubishi i-MiEV battery-management diagnostic trouble code for an abnormal CMU01 module temperature sensor. Verified applicability is limited to US-market 2012, 2014, and 2016 i-MiEV vehicles.

2. Technical explanation

Mitsubishi service-bulletin material identifies P1A82 as “CMU01 module temperature sensor abnormal.” The same diagnostic family includes P1A83 through P1A89 for additional CMU module temperature sensors. The supplied evidence does not establish the specific electrical or mechanical reason P1A82 set in an individual vehicle.

3. What system is affected?

Battery Management Unit (BMU) and main drive lithium-ion battery system; specifically the CMU01 module temperature-sensor diagnostic circuit/function.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • A stored P1A82 diagnostic trouble code may be found with a compatible scan tool. No driver-visible symptoms are established by the supplied verified evidence.

6. Possible causes

  • An abnormal condition associated with the CMU01 module temperature sensor is established by the DTC definition.
  • The underlying cause of the abnormal condition 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

  • Arrange diagnosis by a Mitsubishi-qualified EV service provider.
  • Do not attempt high-voltage battery or battery-management-system repair yourself.
  • Record the code and any scan-tool results for the service provider.

10. Step-by-step troubleshooting

  1. Use the specified Mitsubishi scan tool, MB991958, to check whether the diagnostic trouble code is stored, as described in the supplied Mitsubishi bulletin evidence.
  2. The supplied evidence includes a bulletin decision step stating: if the diagnostic trouble code is stored, replace the BMU; if it is not stored, the check is complete.
  3. Further diagnostic steps, connector checks, wiring tests, sensor tests, and battery-pack procedures are not established by the supplied evidence.

11. When to contact service

Contact a Mitsubishi dealer or qualified EV service provider for diagnosis, particularly because the affected system is the main drive lithium-ion battery and BMU.

12. What the service center may check

  • Confirm whether P1A82 is stored using scan tool MB991958.
  • Apply the supplied Mitsubishi bulletin decision point: stored code—replace the BMU; code not stored—check complete.

13. Possible repair or resolution

  • The supplied Mitsubishi bulletin evidence directs BMU replacement when the applicable diagnostic check finds the DTC stored.
  • No other repair resolution is established by the supplied verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Mitsubishi TSB-19-54-003, published March 13, 2019, includes P1A82 in the CMU module temperature sensor abnormal code family and states a scan-tool decision step: if the DTC is stored, replace the BMU; if not stored, the check is complete.
  • Mitsubishi TSB-19-54-004, published March 13, 2019, likewise includes P1A82 and the same stated scan-tool/BMU replacement decision step.
  • Mitsubishi TSB-19-54-005, published March 13, 2019, references P1A82 through P1A8D in relation to a separate BMU-temperature-sensor rationality diagnostic; it does not establish a P1A82-specific repair in the supplied excerpt.

16. Recall information

  • No recall information is established by the supplied verified evidence.

17. Official manufacturer information

Official NHTSA-hosted manufacturer communications: TSB-19-54-003 (https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf), TSB-19-54-004 (https://static.nhtsa.gov/odi/tsbs/2019/MC-10158409-9999.pdf), and TSB-19-54-005 (https://static.nhtsa.gov/odi/tsbs/2019/MC-10158410-9999.pdf).

19. Frequently asked questions

What does P1A82 mean on a Mitsubishi i-MiEV?

It means “CMU01 module temperature sensor abnormal,” according to the supplied Mitsubishi service-bulletin evidence.

Which vehicles are verified as applicable?

US-market Mitsubishi i-MiEV model years 2012, 2014, and 2016 are verified by the supplied applicability evidence.

Does P1A82 require BMU replacement?

The supplied Mitsubishi bulletin decision step says to replace the BMU if the diagnostic trouble code is stored when checked with scan tool MB991958. Individual vehicle diagnosis is still required.

Is it safe to drive or charge with P1A82?

Not yet established by verified evidence.

20. Sources & verification

Verified
Mitsubishi P1A82: CMU01 module temperature sensor abnormal, P1A83:… | EV Diagnostics