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Mitsubishi P1A8C

CMU11 module temperature sensor abnormal, P1A8D: CMU12 module temperature sensor abnormal . TROUBLE JUDGMENT Check Conditions  Three seconds elapse after the electric motor switch

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 a temperature-sensing component associated with the main drive lithium-ion battery.
Confidence95%

Quick answer

P1A8C identifies an abnormal CMU11 module/battery temperature sensor condition on supported Mitsubishi 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 P1A8C mean?

P1A8C identifies an abnormal CMU11 module/battery temperature sensor condition on supported Mitsubishi i-MiEV vehicles.

2. Technical explanation

Verified Mitsubishi service-bulletin evidence identifies P1A8C as “CMU11 module temperature sensor abnormal” / “CMU11 Battery Temperature Sensor.” The diagnostic judgment conditions include that three seconds have elapsed after the electric motor switch is turned ON, or three seconds have elapsed after main drive lithium-ion battery charging begins. The supplied evidence also states that specified other DTC conditions must not be set, but does not provide the complete list.

3. What system is affected?

CMU11 module temperature sensor associated with the main drive lithium-ion battery.

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 verified evidence establishes an abnormal CMU11 module/battery temperature sensor condition. 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

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

10. Step-by-step troubleshooting

  1. Have a qualified technician retrieve and evaluate stored DTCs using appropriate diagnostic equipment.
  2. Use the applicable Mitsubishi service information to diagnose P1A8C. Further diagnostic steps are not 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 a temperature-sensing component associated with the main drive lithium-ion battery.

12. What the service center may check

  • Confirm P1A8C is stored.
  • Verify diagnostic judgment conditions: at least three seconds after the electric motor switch is turned ON, or at least three seconds after main drive lithium-ion battery charging begins.
  • Review other stored DTCs, including any diagnostic exclusion conditions specified in applicable Mitsubishi service information.

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.
  • Mitsubishi TSB-19-54-004, published March 13, 2019; NHTSA manufacturer communication MC-10158409.
  • Mitsubishi TSB-19-54-005, published March 13, 2019; NHTSA manufacturer communication MC-10158410.

16. Recall information

No recall relationship is established by verified evidence.

17. Official manufacturer information

Verified official NHTSA-hosted Mitsubishi 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 P1A8C mean?

Verified Mitsubishi documentation identifies P1A8C as an abnormal CMU11 module/battery temperature sensor condition.

When can P1A8C be judged?

The supplied Mitsubishi evidence states that the relevant timing is three seconds after the electric motor switch is turned ON or three seconds after main drive lithium-ion battery charging starts, subject to additional DTC conditions.

Which vehicles are supported by the supplied evidence?

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

Is it safe to drive or charge with P1A8C?

Not yet established by verified evidence.

20. Sources & verification

Verified
Mitsubishi P1A8C: CMU11 module temperature sensor abnormal, P1A8D:… | EV Diagnostics