Mitsubishi P1A7D
ion battery starts to be charged. Eithe
Quick answer
P1A7D is identified in Mitsubishi TSB-19-54-005 as a CMU08 Cell Voltage Sensor DTC for the main drive lithium-ion battery on the 2016 US Mitsubishi i-MiEV.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
Watch Videos
Relevant videos play here without leaving this diagnostic page.
No sufficiently relevant embeddable video has been accepted for this diagnostic yet.
Videos are supporting material and never override OEM or regulator evidence.
1. What does P1A7D mean?
P1A7D is identified in Mitsubishi TSB-19-54-005 as a CMU08 Cell Voltage Sensor DTC for the main drive lithium-ion battery on the 2016 US Mitsubishi i-MiEV.
2. Technical explanation
The verified TSB evidence lists P1A7D as “CMU08 Cell Voltage Sensor.” The supplied excerpt states that the trouble judgment can occur 3 seconds after the electric motor switch is turned ON or 3 seconds after main drive lithium-ion battery charging begins. The provided diagnostic title and meaning are truncated and do not establish further fault criteria.
3. What system is affected?
Main drive lithium-ion battery; CMU08 cell voltage sensor.
4. How serious is this code?
Unknown. Severity is not established by the supplied verified evidence.
5. Symptoms you may notice
- A P1A7D diagnostic trouble code may be stored. Further symptoms are not yet established by verified evidence.
6. Possible causes
- The verified TSB identifies the fault area as the CMU08 cell voltage sensor in the main drive lithium-ion battery.
- The TSB evidence states that correction may involve tightening a bus bar in the main drive lithium-ion battery or replacing the main drive lithium-ion battery assembly. The supplied excerpt does not establish the specific condition that determines which repair is needed.
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
- Do not attempt high-voltage battery disassembly or bus-bar work yourself.
- Arrange diagnosis by a qualified Mitsubishi EV service provider.
- Provide the stored code P1A7D and reference Mitsubishi TSB-19-54-005.
10. Step-by-step troubleshooting
- Have a qualified technician confirm P1A7D and diagnose the main drive lithium-ion battery/CMU08 circuit according to applicable Mitsubishi service information.
- The supplied evidence does not establish safe owner-level diagnostic steps.
11. When to contact service
Service is not explicitly classified as required in the supplied diagnostic record, but qualified Mitsubishi EV service diagnosis is appropriate because the TSB repair actions involve the main drive lithium-ion battery.
12. What the service center may check
- Confirm DTC P1A7D, listed by the TSB as CMU08 Cell Voltage Sensor.
- Inspect and address the main drive lithium-ion battery bus-bar condition as directed by Mitsubishi service information.
- Determine whether the main drive lithium-ion battery assembly requires replacement, as applicable under the TSB.
13. Possible repair or resolution
- Tighten the bus bar in the main drive lithium-ion battery.
- Replace the main drive lithium-ion battery assembly.
- The supplied excerpt does not establish when either resolution applies.
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 PDF 10158410. It lists P1A7D as CMU08 Cell Voltage Sensor and identifies potential correction by tightening a main drive lithium-ion battery bus bar or replacing the battery assembly.
16. Recall information
- No recall information is established by the supplied verified evidence.
17. Official manufacturer information
Official source: NHTSA Manufacturer Communication PDF 10158410, Mitsubishi TSB-19-54-005: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158410-9999.pdf. Verified applicability supplied: 2016 Mitsubishi i-MiEV, US.
19. Frequently asked questions
What does Mitsubishi code P1A7D mean?
The verified TSB lists P1A7D as “CMU08 Cell Voltage Sensor.”
When can P1A7D set?
The supplied TSB excerpt states that trouble judgment can occur 3 seconds after the electric motor switch is turned ON or 3 seconds after main drive lithium-ion battery charging starts.
Can I drive or charge with P1A7D?
Not yet established by verified evidence.
Is there a Mitsubishi bulletin for P1A7D?
Yes. Mitsubishi TSB-19-54-005 lists P1A7D and describes possible repair involving a main drive battery bus bar or replacement of the main drive lithium-ion battery assembly.