Mitsubishi P1AA2
CMU ID change (CMU08), P1AA3: CMU ID change (CMU09), P1AA4: CMU ID change (CMU10), P1AA5: CMU ID change (CMU11), P1AA6: CMU ID change (CMU12), . TROUBLE JUDGMENT Check Conditions
Quick answer
P1AA2 is identified in Mitsubishi service information as “CMU ID change (CMU08).” It is verified for U.S. 2012 and 2014 Mitsubishi i-MiEV vehicles. Driving, charging, urgency, and repair requirements are not yet established by verified evidence.
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 P1AA2 mean?
P1AA2 is identified in Mitsubishi service information as “CMU ID change (CMU08).” It is verified for U.S. 2012 and 2014 Mitsubishi i-MiEV vehicles. Driving, charging, urgency, and repair requirements are not yet established by verified evidence.
2. Technical explanation
The supplied official Mitsubishi technical-service-bulletin evidence identifies P1AA2 as a Battery Management Unit (BMU)/main drive lithium-ion battery diagnostic code for a change in the identification number of CMU08. CMU refers to a cell-monitoring unit. The cited material lists P1AA2 with related CMU ID-change codes P1A9B through P1AA6. The supplied excerpt states the trouble judgment check condition occurs when CMUs are numbered for identification and references U1925, “CMU ID numbering reception error,” as part of the diagnostic context. The excerpt does not establish a specific failed component, root cause, vehicle behavior, or repair procedure for P1AA2.
3. What system is affected?
Battery Management Unit (BMU) and main drive lithium-ion battery; specifically the CMU08 identification/numbering context.
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 CMU08 identification-number change is indicated by P1AA2.
- Further root causes are 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 cell-monitoring-unit repairs yourself.
10. Step-by-step troubleshooting
- Use appropriate manufacturer diagnostic information to confirm P1AA2 and assess the BMU/main drive lithium-ion battery system.
- Evaluate the CMU ID-numbering diagnostic context, including U1925 where applicable. Detailed test steps are not established by the supplied verified evidence.
11. When to contact service
Contact a Mitsubishi dealer or qualified EV service provider for diagnosis of the BMU and main drive lithium-ion battery system.
12. What the service center may check
- Confirm the stored DTC(s) with manufacturer-capable diagnostic equipment.
- Assess CMU identification numbering in accordance with Mitsubishi service information.
- Check for U1925, identified in the supplied technical-service-bulletin excerpt as “CMU ID numbering reception error,” where applicable.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Mitsubishi i-MiEV · 2012 · US
- Mitsubishi i-MiEV · 2014 · US
15. Related TSBs / service bulletins
- 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
- 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
16. Recall information
No recall relationship is established by verified evidence.
17. Official manufacturer information
Verified applicability: U.S.-market 2012 and 2014 Mitsubishi i-MiEV. Official NHTSA-hosted Mitsubishi service-bulletin evidence identifies P1AA2 as “CMU ID change (CMU08).”
19. Frequently asked questions
What does P1AA2 mean on a Mitsubishi i-MiEV?
It means “CMU ID change (CMU08)” in the supplied Mitsubishi service information.
Which vehicles are verified as applicable?
U.S.-market 2012 and 2014 Mitsubishi i-MiEV vehicles are verified by the supplied evidence.
Can I drive or charge with P1AA2?
Not yet established by verified evidence.
Is P1AA2 connected to U1925?
The supplied bulletin excerpt references U1925 as “CMU ID numbering reception error” in the P1AA2 diagnostic context, but it does not establish that U1925 will always be present.