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Mitsubishi P0A0A

ion Battery se ts the service plug state to the EV-ECU by means of the service plug switch signal. . DTC SET CONDITION  When the signal of the service plug switch in the Main Driv

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService by personnel qualified to diagnose high-voltage EV systems is appropriate. Mitsubishi’s procedure involves Main Drive Lithium-ion Battery connector testing and high-voltage-system service precautions.
Confidence95%

Quick answer

P0A0A is a Mitsubishi i-MiEV diagnostic trouble code for the main drive lithium-ion battery service-plug switch signal. It is stored when the EV-ECU detects that this signal is off.

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 P0A0A mean?

P0A0A is a Mitsubishi i-MiEV diagnostic trouble code for the main drive lithium-ion battery service-plug switch signal. It is stored when the EV-ECU detects that this signal is off.

2. Technical explanation

The service-plug switch in the Main Drive Lithium-ion Battery reports the service-plug state to the EV-ECU. According to Mitsubishi’s published diagnostic procedure, P0A0A is stored when the service-plug-switch signal from the Main Drive Lithium-ion Battery is turned off.

3. What system is affected?

Main Drive Lithium-ion Battery service-plug switch signal and EV-ECU.

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

  • Damaged wiring harness or connector(s).
  • Disengagement of the service plug in the Main Drive Lithium-ion Battery.
  • Malfunction of the service-plug switch.
  • Malfunction of the EV-ECU.

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 qualified Mitsubishi EV service provider.
  • Do not perform high-voltage service-plug, battery, wiring, or EV-ECU repairs yourself.

10. Step-by-step troubleshooting

  1. Mitsubishi’s diagnostic procedure begins with measurement at the C-22 Main Drive Lithium-ion Battery assembly connector.
  2. The published procedure includes checking whether P0A0A resets after the DTC is erased and the electric motor switch is moved from LOCK (OFF) to ON.
  3. If P0A0A resets, Mitsubishi’s procedure directs the technician to return to the initial diagnostic step; if it does not reset, the diagnosis is complete.

11. When to contact service

Service by personnel qualified to diagnose high-voltage EV systems is appropriate. Mitsubishi’s procedure involves Main Drive Lithium-ion Battery connector testing and high-voltage-system service precautions.

12. What the service center may check

  • Inspect the relevant wiring harness and connectors for damage.
  • Check whether the Main Drive Lithium-ion Battery service plug is disengaged.
  • Test the service-plug switch and its signal circuit using Mitsubishi’s published diagnostic procedure.
  • Evaluate the EV-ECU only after applicable circuit and service-plug checks.

13. Possible repair or resolution

  • Repair or replace the verified failed wiring, connector, service plug, service-plug switch, or EV-ECU as determined through Mitsubishi’s diagnostic procedure.
  • Not yet established by verified evidence whether a particular component replacement is required for every P0A0A occurrence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Mitsubishi TSB-19-54-004, published March 13, 2019, includes the P0A0A Service Plug Switch diagnostic procedure.
  • Mitsubishi TSB-19-54-003, published March 13, 2019, includes the P0A0A Service Plug Switch diagnostic procedure.
  • Mitsubishi TSB-19-54-005 includes continuation material referring to confirmation of whether P0A0A is set again after clearing the DTC.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified NHTSA-hosted Mitsubishi manufacturer communications: TSB-19-54-004 (https://static.nhtsa.gov/odi/tsbs/2019/MC-10158409-9999.pdf), TSB-19-54-005 (https://static.nhtsa.gov/odi/tsbs/2019/MC-10158410-9999.pdf), and TSB-19-54-003 (https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf). Verified applicability is U.S.-market Mitsubishi i-MiEV model years 2012, 2014, and 2016.

19. Frequently asked questions

What does P0A0A mean?

It indicates that the EV-ECU has detected the Main Drive Lithium-ion Battery service-plug-switch signal as off.

What can cause P0A0A?

Verified probable causes are damaged wiring or connectors, a disengaged Main Drive Lithium-ion Battery service plug, a failed service-plug switch, or an EV-ECU malfunction.

Is it safe to drive or charge with P0A0A?

Not yet established by verified evidence.

Does P0A0A apply to all Mitsubishi vehicles?

Verified applicability is limited to U.S. Mitsubishi i-MiEV model years 2012, 2014, and 2016.

20. Sources & verification

ReferenceVerified
Mitsubishi P0A0A: ion Battery se ts the service plug state to the… | EV Diagnostics