Mitsubishi P1A92
CMU05 balancer abnormal, P1A93: CMU06 balancer abnormal, P1A94: CMU07 balancer abnormal, P1A95: CMU08 balancer abnormal, P1A96: CMU09 balancer abnormal, P1A97: CMU10 balancer abnor
Quick answer
P1A92 is identified in Mitsubishi service-bulletin evidence as “CMU05 balancer abnormal.” Verified applicability is limited to U.S. 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 P1A92 mean?
P1A92 is identified in Mitsubishi service-bulletin evidence as “CMU05 balancer abnormal.” Verified applicability is limited to U.S. 2012 and 2014 Mitsubishi i-MiEV vehicles.
2. Technical explanation
The supplied official Mitsubishi/NHTSA bulletin evidence groups P1A92 with battery cell-monitoring-unit (CMU) balancer abnormal codes. Specifically, P1A92 corresponds to CMU05. The evidence does not establish the underlying electrical failure mechanism, vehicle symptoms, or operating risk.
3. What system is affected?
Battery Management Unit (BMU) and main drive lithium-ion battery, as referenced by the supplied bulletin evidence.
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 CMU05 balancer abnormal condition is identified by the diagnostic 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-qualified EV service facility.
- Do not attempt high-voltage battery, CMU, or BMU repair yourself.
10. Step-by-step troubleshooting
- The supplied bulletin evidence specifies use of scan tool MB991958 to check whether the diagnostic trouble code is stored during its procedure.
- The full preceding diagnostic decision steps and conditions are not established by the supplied evidence excerpt.
11. When to contact service
Contact a Mitsubishi dealer or qualified EV service facility for diagnosis, particularly because the bulletin procedure concerns the main drive lithium-ion battery and BMU.
12. What the service center may check
- Use the applicable Mitsubishi diagnostic procedure and scan tool MB991958, as referenced in the official bulletin evidence.
- In the supplied bulletin excerpt, after main drive lithium-ion battery replacement, the code is checked with scan tool MB991958. If the DTC is stored, the bulletin directs replacement of the BMU; if it is not stored, the check is complete.
13. Possible repair or resolution
- The supplied bulletin excerpt directs replacement of the main drive lithium-ion battery in one branch of its procedure, followed by a DTC check.
- If the DTC remains stored after that check, the excerpt directs replacement of the BMU.
- Whether those steps apply to every P1A92 occurrence is not yet established by the supplied evidence excerpt.
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 MC-10158409-9999. It lists P1A92 as “CMU05 balancer abnormal.”
- TSB-19-54-003, published March 13, 2019; NHTSA manufacturer communication MC-10158408-9999. It lists P1A92 as “CMU05 balancer abnormal.”
16. Recall information
- No recall information was supplied or established by verified evidence.
17. Official manufacturer information
Official NHTSA-hosted manufacturer communications: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158409-9999.pdf and https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf
19. Frequently asked questions
What does Mitsubishi code P1A92 mean?
Verified bulletin evidence identifies P1A92 as “CMU05 balancer abnormal.”
Which vehicles are verified as applicable?
The supplied applicability evidence identifies U.S.-market 2012 and 2014 Mitsubishi i-MiEV vehicles.
Is it safe to drive or charge with P1A92?
Not yet established by verified evidence.
What repair does the bulletin excerpt specify?
The excerpt includes a branch directing main drive lithium-ion battery replacement, followed by a scan-tool DTC check; if the DTC is stored, it directs BMU replacement. Full applicability and preceding conditions are not established by the excerpt.