EV Diagnostics
Verified EV diagnostic knowledge page

Mitsubishi P1A74

CMU11 module temperature abnormal (high input), P1A75: CMU12 module temperature abnormal (high input) . TROUBLE JUDGMENT Check Conditions  Three seconds elapse after the electric

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Mitsubishi dealer or qualified EV service facility for diagnosis, particularly because this code concerns main drive lithium-ion battery temperature monitoring.
Confidence95%

Quick answer

P1A74 is identified in verified Mitsubishi service-bulletin evidence as “CMU11 module temperature abnormal (high input).”

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

Video guides

Watch Videos

Relevant videos play here without leaving this diagnostic page.

No sufficiently relevant embeddable video has been accepted for this diagnostic yet.

Videos are supporting material and never override OEM or regulator evidence.

1. What does P1A74 mean?

P1A74 is identified in verified Mitsubishi service-bulletin evidence as “CMU11 module temperature abnormal (high input).”

2. Technical explanation

Verified evidence states that the diagnostic judgment can occur after three seconds from turning the electric motor switch ON or after the main drive lithium-ion battery begins charging. The supplied evidence does not establish the complete diagnostic thresholds, root cause, or repair for an individual vehicle.

3. What system is affected?

CMU11 battery temperature monitoring within the main drive lithium-ion battery system.

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

  • A CMU11 module temperature abnormal high-input condition is identified by the DTC definition. The 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

  • Arrange diagnosis by a Mitsubishi-qualified EV service facility.
  • Do not attempt high-voltage battery, CMU, or wiring repair yourself.

10. Step-by-step troubleshooting

  1. Verified evidence indicates evaluation may occur three seconds after the electric motor switch is turned ON or three seconds after main drive lithium-ion battery charging begins.
  2. Further diagnostic steps are not yet established by the supplied verified evidence.

11. When to contact service

Contact a Mitsubishi dealer or qualified EV service facility for diagnosis, particularly because this code concerns main drive lithium-ion battery temperature monitoring.

12. What the service center may check

  • Confirm the stored DTC and associated vehicle information using appropriate manufacturer diagnostic procedures.
  • Further service checks are not yet 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

  • Mitsubishi TSB-19-54-003, published March 13, 2019; NHTSA manufacturer communication MC-10158408: includes P1A74 as CMU11 module temperature abnormal (high input).
  • Mitsubishi TSB-19-54-004, published March 13, 2019; NHTSA manufacturer communication MC-10158409: includes P1A74 as CMU11 module temperature abnormal (high input).
  • Mitsubishi TSB-19-54-005, published March 13, 2019; NHTSA manufacturer communication MC-10158410: includes P1A74 in a list of CMU battery-temperature DTCs.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified applicability is Mitsubishi i-MiEV, U.S. market, model years 2012, 2014, and 2016. Official NHTSA-hosted manufacturer communications: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf ; https://static.nhtsa.gov/odi/tsbs/2019/MC-10158409-9999.pdf ; https://static.nhtsa.gov/odi/tsbs/2019/MC-10158410-9999.pdf

19. Frequently asked questions

What does P1A74 mean?

Verified evidence identifies P1A74 as “CMU11 module temperature abnormal (high input).”

When can P1A74 be evaluated?

The supplied Mitsubishi bulletin evidence states that the judgment check may occur three seconds after the electric motor switch is turned ON or three seconds after the main drive lithium-ion battery starts charging.

Which vehicles are verified as applicable?

The supplied applicability evidence identifies U.S.-market Mitsubishi i-MiEV model years 2012, 2014, and 2016.

Is it safe to drive or charge with P1A74?

Not yet established by verified evidence.

20. Sources & verification

Verified
Mitsubishi P1A74: CMU11 module temperature abnormal (high input),… | EV Diagnostics