Mitsubishi P1A7E
ion battery starts to be charged. Either one of the following diagnostic
Quick answer
For a 2016 Mitsubishi i-MiEV (US), DTC P1A7E is identified in an official Mitsubishi service bulletin as “CMU09 Cell Voltage Sensor.”
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 P1A7E mean?
For a 2016 Mitsubishi i-MiEV (US), DTC P1A7E is identified in an official Mitsubishi service bulletin as “CMU09 Cell Voltage Sensor.”
2. Technical explanation
The verified bulletin lists P1A7E among main drive lithium-ion battery Cell Monitoring Unit (CMU) cell-voltage sensor DTCs. Its excerpt states the diagnostic check can occur 3 seconds after the electric motor switch is turned ON or 3 seconds after main drive battery charging begins. The supplied evidence does not establish the complete fault criteria or a specific failed component.
3. What system is affected?
Main drive lithium-ion battery / CMU09 cell-voltage sensing, as identified by the verified TSB.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- A P1A7E DTC may be stored. No driver-visible symptoms are established by the supplied verified evidence.
6. Possible causes
- A CMU09 cell-voltage sensor diagnostic condition is indicated by the verified TSB.
- 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 service facility.
- Do not attempt high-voltage battery or CMU repair yourself.
10. Step-by-step troubleshooting
- Have a qualified technician retrieve and confirm the stored DTC.
- Use the applicable Mitsubishi service information and the verified bulletin during diagnosis. Further diagnostic steps are not established by the supplied evidence.
11. When to contact service
Contact a Mitsubishi dealer or qualified EV service facility for diagnosis of the main drive lithium-ion battery system.
12. What the service center may check
- Confirm P1A7E is present.
- Inspect and diagnose the main drive lithium-ion battery CMU09 cell-voltage sensing concern according to applicable Mitsubishi service information. Specific inspection procedures are not established by the supplied evidence.
13. Possible repair or resolution
- The verified bulletin excerpt references main drive lithium-ion battery repair or replacement, but it does not establish which repair is required for P1A7E in an individual vehicle.
- Final repair resolution is not yet established by verified evidence.
14. Affected vehicles
- Mitsubishi i-MiEV · 2016 · US
15. Related TSBs / service bulletins
- Mitsubishi TSB-19-54-005, published March 13, 2019; NHTSA manufacturer communication MC-10158410-9999. The supplied excerpt lists P1A7E as “CMU09 Cell Voltage Sensor.”
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Verified official source: NHTSA-hosted Mitsubishi manufacturer communication MC-10158410-9999, TSB-19-54-005: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158410-9999.pdf
19. Frequently asked questions
What does P1A7E mean on a 2016 Mitsubishi i-MiEV?
The verified Mitsubishi bulletin identifies P1A7E as “CMU09 Cell Voltage Sensor.”
When can P1A7E be evaluated?
The supplied TSB excerpt says the check conditions include 3 seconds after the electric motor switch is turned ON or 3 seconds after the main drive lithium-ion battery starts charging.
Is P1A7E covered by a recall?
Not yet established by verified evidence.