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Mitsubishi P1AB6

CMU02 module temperature abnormal (low input), P1AB7: CMU03 module temperature abnormal (low input), P1AB8: CMU04 module temperature abnormal (low input), P1AB9: CMU05 module tempe

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService is appropriate because the verified procedure concerns the Main Drive Lithium-ion Battery. Use a Mitsubishi dealer or qualified EV service provider.
Confidence95%

Quick answer

P1AB6 is a Mitsubishi battery-management diagnostic trouble code for “CMU02 module temperature abnormal (low input).” Verified applicability is limited to U.S.-market 2012 and 2014 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 P1AB6 mean?

P1AB6 is a Mitsubishi battery-management diagnostic trouble code for “CMU02 module temperature abnormal (low input).” Verified applicability is limited to U.S.-market 2012 and 2014 Mitsubishi i-MiEV vehicles.

2. Technical explanation

The supplied Mitsubishi service-bulletin evidence identifies P1AB6 as a low-input abnormality for the CMU02 module temperature signal. The evidence also describes a BMU special-function check named “CMU ID numbering” and directs replacement of the Main Drive Lithium-ion Battery if the specified diagnostic result is obtained. The supplied excerpt does not establish the underlying component-level cause of the low-input condition.

3. What system is affected?

Main Drive Lithium-ion Battery / Battery Management Unit (BMU) and CMU02 temperature monitoring.

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 CMU02 module-temperature low-input abnormality is identified by the code.
  • 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-capable EV service provider.
  • Do not attempt high-voltage battery diagnosis, disassembly, or repair yourself.

10. Step-by-step troubleshooting

  1. A Mitsubishi service procedure cited in the supplied evidence uses the BMU special function “CMU ID numbering.”
  2. The supplied evidence states that, when the specified diagnostic result is present, the Main Drive Lithium-ion Battery is to be replaced.
  3. The complete decision criteria and all prerequisite steps are not fully established by the supplied excerpt.

11. When to contact service

Service is appropriate because the verified procedure concerns the Main Drive Lithium-ion Battery. Use a Mitsubishi dealer or qualified EV service provider.

12. What the service center may check

  • Confirm the stored BMU diagnostic trouble code.
  • Perform the BMU “CMU ID numbering” special-function procedure referenced in Mitsubishi TSB-19-54-003 and TSB-19-54-004.
  • Follow the bulletin decision path for the recorded diagnostic result.

13. Possible repair or resolution

  • The supplied Mitsubishi bulletin excerpt directs replacement of the Main Drive Lithium-ion Battery when its specified diagnostic result is obtained.
  • No other repair resolution is established by the supplied evidence.

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

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official manufacturer communications supplied through NHTSA identify P1AB6 as “CMU02 module temperature abnormal (low input)” and describe a BMU diagnostic procedure. Verified applicability: U.S. 2012 and 2014 Mitsubishi i-MiEV.

19. Frequently asked questions

What does P1AB6 mean on a Mitsubishi i-MiEV?

It means “CMU02 module temperature abnormal (low input),” according to the supplied Mitsubishi bulletin evidence.

Which vehicles are verified as applicable?

U.S.-market 2012 and 2014 Mitsubishi i-MiEV vehicles are verified by the supplied applicability data.

Does P1AB6 require battery replacement?

The supplied bulletin excerpt directs replacement of the Main Drive Lithium-ion Battery when its specified diagnostic result is obtained after the referenced BMU procedure. The excerpt does not establish that every occurrence of P1AB6 alone requires replacement.

Is it safe to drive or charge with P1AB6?

Not yet established by verified evidence.

20. Sources & verification

Verified
Mitsubishi P1AB6: CMU02 module temperature abnormal (low input),… | EV Diagnostics