Mitsubishi P0AA4
Return to Step 1. NO : The diagnosis is complete. DTC P0ADB Main contactor (+) circuit (low input) DTC P0ADF Main contactor () circuit (low input) . OPERATION The main contactors
Quick answer
For verified 2012, 2014, and 2016 US-market Mitsubishi i-MiEV applicability, P0AA4 is documented in Mitsubishi EV-ECU diagnostic material. The supplied evidence does not establish a reliable plain-language definition, severity, driving safety, charging safety, or a specific repair for P0AA4.
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 P0AA4 mean?
For verified 2012, 2014, and 2016 US-market Mitsubishi i-MiEV applicability, P0AA4 is documented in Mitsubishi EV-ECU diagnostic material. The supplied evidence does not establish a reliable plain-language definition, severity, driving safety, charging safety, or a specific repair for P0AA4.
2. Technical explanation
The supplied official Mitsubishi diagnostic-material excerpts describe a confirmation process: erase the stored DTC, cycle the electric motor switch through ON and temporarily START, then check whether P0AA4 is stored/set again in the EV-ECU. If it is stored again, the procedure says to return to Step 1; if not, diagnosis is complete. The excerpts also transition to P0ADB and P0ADF information, stating that the main contactors (+) and (−) in the main drive lithium-ion battery are controlled by the EV-ECU. The supplied excerpts do not establish that this contactor description is the definition, cause, or repair of P0AA4.
3. What system is affected?
EV-ECU diagnostic system. The evidence also references main contactors in the main drive lithium-ion battery, but does not establish their specific relationship to the meaning of P0AA4.
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
- 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
- Have a qualified Mitsubishi EV service provider diagnose the stored EV-ECU DTC.
- Do not attempt high-voltage battery or main-contactor repair yourself.
10. Step-by-step troubleshooting
- Verified service-manual confirmation sequence: erase the stored DTC, cycle the electric motor switch from LOCK (OFF) to ON and temporarily to START, then check whether P0AA4 is stored/set again in the EV-ECU.
- If P0AA4 is stored/set again, the cited procedure directs the technician to return to Step 1.
- If P0AA4 is not stored/set again, the cited procedure states that diagnosis is complete.
11. When to contact service
Professional service is appropriate because the verified material places this DTC in EV-ECU diagnostic procedures and references components within the main drive lithium-ion battery. Service urgency is not yet established by verified evidence.
12. What the service center may check
- Check whether P0AA4 is stored/set again in the EV-ECU after the documented erase-and-switch-cycle confirmation procedure.
- Follow the applicable Mitsubishi diagnostic procedure beginning at Step 1 if P0AA4 returns.
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-19-54-003, published March 13, 2019; available through NHTSA manufacturer communication MC-10158408.
- Mitsubishi TSB-19-54-004, published March 13, 2019; available through NHTSA manufacturer communication MC-10158409.
- Mitsubishi TSB-19-54-005, published March 13, 2019; available through NHTSA manufacturer communication MC-10158410.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Verified applicability: US-market Mitsubishi i-MiEV model years 2012, 2014, and 2016. Official sources: NHTSA-hosted Mitsubishi manufacturer communications MC-10158408, MC-10158409, and MC-10158410, published March 13, 2019.
19. Frequently asked questions
What does P0AA4 mean on a Mitsubishi i-MiEV?
The supplied verified evidence does not establish a dependable plain-language definition for P0AA4. It establishes that P0AA4 is checked in the EV-ECU through a documented confirmation procedure.
Which vehicles are verified as applicable?
US-market Mitsubishi i-MiEV vehicles from model years 2012, 2014, and 2016.
What happens if P0AA4 does not return after the documented check?
The cited diagnostic material states that diagnosis is complete if P0AA4 is not stored/set again after the procedure.
Is it safe to drive or charge with P0AA4?
Not yet established by verified evidence.