Mitsubishi P1A83
CMU02 module temperature sensor abnormal, P1A84: CMU03 module temperature sensor abnormal, P1A85: CMU04 module temperature sensor abnormal, P1A86: CMU05 module temperature sensor a
Quick answer
P1A83 is identified in Mitsubishi service information as “CMU02 module temperature sensor abnormal.” For applicable U.S. 2012 and 2014 Mitsubishi i-MiEV vehicles, the supplied Mitsubishi TSB evidence directs replacement of the Battery Management Unit (BMU) if the diagnostic trouble code 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 P1A83 mean?
P1A83 is identified in Mitsubishi service information as “CMU02 module temperature sensor abnormal.” For applicable U.S. 2012 and 2014 Mitsubishi i-MiEV vehicles, the supplied Mitsubishi TSB evidence directs replacement of the Battery Management Unit (BMU) if the diagnostic trouble code is stored.
2. Technical explanation
The verified TSB evidence lists P1A83 among battery-module temperature-sensor diagnostic codes and defines it as “CMU02 module temperature sensor abnormal.” The same evidence includes a diagnostic decision: if the diagnostic trouble code is stored, replace the BMU; if it is not stored, the check is complete. The supplied evidence does not establish the underlying electrical or sensor-level failure mechanism.
3. What system is affected?
Battery Management Unit (BMU) and main drive lithium-ion battery system; specifically, the CMU02 module temperature-sensor monitoring function.
4. How serious is this code?
Not yet established by verified evidence. The supplied record lists severity as unknown.
5. Symptoms you may notice
- A stored P1A83 diagnostic trouble code is established by the supplied TSB evidence.
- No driver-visible symptoms are established by verified evidence.
6. Possible causes
- The verified definition is an abnormality reported for the CMU02 module temperature sensor.
- The specific underlying cause is not yet established by verified evidence.
7. Can I still drive the vehicle?
Not yet established by verified evidence. The supplied record lists safe-to-drive status as unknown.
8. Can I charge the vehicle?
Not yet established by verified evidence. The supplied record lists safe-to-charge status as unknown.
9. What you can safely do
- Have the vehicle evaluated by a Mitsubishi-qualified service facility.
- Do not attempt high-voltage battery, CMU, temperature-sensor, or BMU repair procedures yourself based on this information.
10. Step-by-step troubleshooting
- Confirm whether P1A83 is stored using appropriate diagnostic equipment.
- Per the supplied TSB decision path: if the diagnostic trouble code is stored, replace the BMU; if it is not stored, the check is complete.
- No further diagnostic steps are established by the supplied verified evidence.
11. When to contact service
Service evaluation is appropriate because the verified Mitsubishi TSB directs BMU replacement when P1A83 is stored. The supplied record does not independently establish urgency, driving restrictions, or charging restrictions.
12. What the service center may check
- Retrieve and verify whether P1A83 is stored.
- Apply the TSB decision path for the stored-code result.
- If P1A83 is stored, replace the BMU as directed by the supplied TSB evidence.
13. Possible repair or resolution
- Verified TSB-directed resolution when P1A83 is stored: replace the Battery Management Unit (BMU).
- If the diagnostic trouble code is not stored, the supplied TSB states that the check is complete.
14. Affected vehicles
- Mitsubishi i-MiEV · 2012 · US
- Mitsubishi i-MiEV · 2014 · US
15. Related TSBs / service bulletins
- TSB-19-54-004, published March 13, 2019. NHTSA manufacturer communication 10158409. The supplied excerpt lists P1A83 as “CMU02 module temperature sensor abnormal” and directs BMU replacement if the DTC is stored. https://static.nhtsa.gov/odi/tsbs/2019/MC-10158409-9999.pdf
- TSB-19-54-003, published March 13, 2019. NHTSA manufacturer communication 10158408. The supplied excerpt lists P1A83 as “CMU02 module temperature sensor abnormal” and directs BMU replacement if the DTC is stored. https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Verified source: Mitsubishi manufacturer communications filed with NHTSA, TSB-19-54-004 / NHTSA MC-10158409 and TSB-19-54-003 / NHTSA MC-10158408, both published March 13, 2019.
19. Frequently asked questions
What does Mitsubishi code P1A83 mean?
The supplied Mitsubishi TSB evidence defines P1A83 as “CMU02 module temperature sensor abnormal.”
What vehicles are established as applicable?
The supplied applicability evidence identifies U.S.-market 2012 and 2014 Mitsubishi i-MiEV vehicles.
What does the supplied TSB direct if P1A83 is stored?
It directs replacement of the Battery Management Unit (BMU).
Can I continue driving or charging with P1A83?
Not yet established by verified evidence. Both safe-to-drive and safe-to-charge status are recorded as unknown in the supplied data.