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Mitsubishi P1A33

ECU. Q: Is the diagnostic trouble code stored? YES : Carry out troubleshooting for diagnostic trouble code No. P1A3 0, P1A31 or P1B33. NO : Go to Step 2. STEP 2. Scan tool MB991958

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceProfessional Mitsubishi/EV-qualified diagnosis is appropriate because the verified procedure requires scan tool MB991958 and concerns systems associated with the main drive lithium-ion battery and electric motor unit.
Confidence95%

Quick answer

For a 2012 Mitsubishi i-MiEV (US), P1A33 is documented in EV-ECU charging-system diagnosis. The verified procedure first checks whether P1A30, P1A31, or P1A33 is stored using scan tool MB991958. If stored, Mitsubishi directs diagnosis for the applicable listed DTC.

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 P1A33 mean?

For a 2012 Mitsubishi i-MiEV (US), P1A33 is documented in EV-ECU charging-system diagnosis. The verified procedure first checks whether P1A30, P1A31, or P1A33 is stored using scan tool MB991958. If stored, Mitsubishi directs diagnosis for the applicable listed DTC.

2. Technical explanation

Verified NHTSA-published Mitsubishi TSB-19-54-003 places P1A33 in EV-ECU diagnosis for the battery management unit/main drive lithium-ion battery and electric motor unit/main drive lithium-ion battery. The cited diagnostic step instructs use of scan tool MB991958 to check whether P1A30, P1A31, or P1A33 is stored in the EV-ECU. When a code is stored, the procedure directs troubleshooting for the applicable code. If no listed DTC is stored, the procedure continues to a scan-tool data-list step involving the domestic power supply facility, regular charging cable, and service data.

3. What system is affected?

EV-ECU diagnostic process associated in the verified bulletin with the battery management unit (BMU), main drive lithium-ion battery, and electric motor unit/main drive lithium-ion battery.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • A stored P1A33 in the EV-ECU is the verified diagnostic condition.
  • Additional vehicle symptoms are 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 the EV-ECU checked with Mitsubishi scan tool MB991958 or equivalent authorized diagnostic equipment.
  • Use the applicable Mitsubishi diagnostic procedure for any stored P1A30, P1A31, or P1A33.
  • Do not attempt high-voltage battery or electric-drive repair without qualified EV service training.

10. Step-by-step troubleshooting

  1. Use scan tool MB991958 to check whether P1A30, P1A31, or P1A33 is stored in the EV-ECU.
  2. If one of these DTCs is stored, carry out troubleshooting for the applicable stored DTC as directed by the Mitsubishi procedure.
  3. If none is stored, the cited procedure proceeds to scan-tool data-list checks that include the domestic power supply facility, connection of the regular charging cable, and service data.

11. When to contact service

Professional Mitsubishi/EV-qualified diagnosis is appropriate because the verified procedure requires scan tool MB991958 and concerns systems associated with the main drive lithium-ion battery and electric motor unit.

12. What the service center may check

  • Retrieve EV-ECU DTCs with scan tool MB991958.
  • Check for P1A30, P1A31, or P1A33 as specified in TSB-19-54-003.
  • If no listed DTC is stored, continue with the bulletin's data-list procedure, including checks involving the domestic power supply facility and regular charging cable.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Mitsubishi TSB-19-54-003, published through NHTSA as Manufacturer Communication MC-10158408, dated March 13, 2019. The supplied excerpt documents the EV-ECU DTC check and subsequent data-list diagnostic path.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official source: NHTSA Manufacturer Communication PDF MC-10158408, Mitsubishi TSB-19-54-003: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf

19. Frequently asked questions

What vehicle is verified for this P1A33 information?

The supplied applicability evidence identifies the 2012 Mitsubishi i-MiEV in the US.

What does the verified procedure require first?

It requires scan tool MB991958 to check whether P1A30, P1A31, or P1A33 is stored in the EV-ECU.

Does this evidence confirm that P1A33 makes the vehicle unsafe to drive or charge?

No. Driveability and charging safety status are not yet established by verified evidence.

20. Sources & verification

Verified
Mitsubishi P1A33: ECU. Q: Is the diagnostic trouble code stored? YES :… | EV Diagnostics