Mitsubishi P1A8D
CMU12 module temperature sensor abnormal . TROUBLE JUDGMENT Check Conditions Three seconds elapse after the electric motor switch is turned ON, o r three seconds elapse after the
Quick answer
P1A8D is a Mitsubishi DTC for “CMU12 module temperature sensor abnormal.” Verified applicability is limited to U.S.-market 2012, 2014, and 2016 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 P1A8D mean?
P1A8D is a Mitsubishi DTC for “CMU12 module temperature sensor abnormal.” Verified applicability is limited to U.S.-market 2012, 2014, and 2016 Mitsubishi i-MiEV vehicles.
2. Technical explanation
NHTSA-hosted Mitsubishi service information identifies P1A8D as a fault concerning the CMU12 module temperature sensor. The documented judgment conditions include that three seconds have elapsed after the electric motor switch is turned ON, or three seconds have elapsed after Main Drive Lithium-ion Battery charging begins. The supplied evidence also states that specified other DTC conditions apply, including P1AA8 local CAN (for the Main Drive Lithium-ion Battery); the complete condition list is not available in the supplied excerpt.
3. What system is affected?
CMU12 module temperature sensor within the Main Drive Lithium-ion Battery monitoring/management system.
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 CMU12 module temperature sensor abnormality is identified by the DTC definition.
- The specific underlying cause of the abnormality 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 temperature-sensor repairs yourself.
10. Step-by-step troubleshooting
- Confirm the stored DTC with an appropriate diagnostic tool.
- Have a qualified technician follow the applicable Mitsubishi service information for P1A8D.
- No further user-level diagnostic procedure is established by the supplied verified evidence.
11. When to contact service
Service need is not explicitly established by the supplied evidence. Because this code concerns the Main Drive Lithium-ion Battery monitoring system, professional EV diagnosis is appropriate.
12. What the service center may check
- Confirm whether P1A8D is current or stored.
- Evaluate the CMU12 module temperature-sensor fault using the applicable Mitsubishi diagnostic procedure.
- Review related battery-system DTCs, including the documented P1AA8 local-CAN condition 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
- Mitsubishi i-MiEV · 2016 · US
15. Related TSBs / service bulletins
- Mitsubishi TSB-19-54-004, published March 13, 2019 and hosted by NHTSA as MC-10158409-9999, includes P1A8D as “CMU12 module temperature sensor abnormal.”
- Mitsubishi TSB-19-54-003, published March 13, 2019 and hosted by NHTSA as MC-10158408-9999, also includes P1A8D in the CMU module temperature-sensor DTC list.
- The supplied evidence does not establish a repair, warranty extension, or campaign specifically for P1A8D.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Official NHTSA-hosted Mitsubishi manufacturer communications: TSB-19-54-004 (https://static.nhtsa.gov/odi/tsbs/2019/MC-10158409-9999.pdf) and TSB-19-54-003 (https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf).
19. Frequently asked questions
What does Mitsubishi code P1A8D mean?
It means “CMU12 module temperature sensor abnormal.”
Which vehicles are verified as applicable?
The supplied data verifies U.S.-market Mitsubishi i-MiEV model years 2012, 2014, and 2016 only.
Can I drive or charge with P1A8D?
Not yet established by verified evidence.
Does P1A8D identify a failed part?
The code identifies an abnormality involving the CMU12 module temperature sensor. The specific failed component or root cause is not yet established by verified evidence.