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Mitsubishi P1D03

AC Input Current (High) . TROUBLE JUDGMENT Check Conditions  While the on board charger is allowed to be charged from the EV-ECU.  While the AC power supply is being input. Judgm

DriveNot yet established by verified evidence.
ChargeThe verified evidence states that charging is stopped when P1D03 sets. Whether charging can resume or continue under other conditions is not yet established by verified evidence.
ServiceService is appropriate because the official Mitsubishi TSB provides a component-replacement direction if P1D03 resets during the specified regular-charge test. High-voltage work should be performed by qualified personnel.
Confidence95%

Quick answer

P1D03 is a Mitsubishi i-MiEV charging DTC for AC input current being higher than the allowed maximum. Verified evidence states that charging is stopped when this code sets.

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 P1D03 mean?

P1D03 is a Mitsubishi i-MiEV charging DTC for AC input current being higher than the allowed maximum. Verified evidence states that charging is stopped when this code sets.

2. Technical explanation

The verified TSB defines P1D03 as “AC Input Current (High).” It is judged while the EV-ECU allows the onboard charger to charge and AC power is being supplied. The judgment criterion is that the effective AC input current exceeds the maximum input-current value.

3. What system is affected?

Onboard charger/DC-DC converter charging system; the TSB specifically references the onboard charger/DC-DC converter.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • Charging is stopped when P1D03 sets.

6. Possible causes

  • The verified evidence establishes that effective AC input current exceeded the maximum input-current value.
  • A specific underlying component cause is not yet established by verified evidence.
  • If the DTC does not return after the specified test, the TSB identifies the condition as an intermittent malfunction.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

The verified evidence states that charging is stopped when P1D03 sets. Whether charging can resume or continue under other conditions is not yet established by verified evidence.

9. What you can safely do

  • Do not attempt high-voltage diagnosis or repair.
  • Arrange diagnosis by a qualified Mitsubishi EV service provider.
  • Record the charging conditions and whether the DTC returns after service testing, if this information is available.

10. Step-by-step troubleshooting

  1. The TSB procedure directs the technician to erase the DTC, perform a regular charge, and check whether the DTC resets.
  2. If P1D03 resets, the TSB directs replacement of the onboard charger/DC-DC converter, following the removal and installation procedure in the TSB.
  3. If P1D03 does not reset, the TSB identifies an intermittent malfunction and refers to Mitsubishi intermittent-malfunction diagnostic guidance.

11. When to contact service

Service is appropriate because the official Mitsubishi TSB provides a component-replacement direction if P1D03 resets during the specified regular-charge test. High-voltage work should be performed by qualified personnel.

12. What the service center may check

  • Confirm the DTC and erase it.
  • Perform a regular charge.
  • Check whether P1D03 is set again.
  • If it resets, replace the onboard charger/DC-DC converter according to TSB-20-54-003.
  • If it does not reset, follow Mitsubishi guidance for intermittent malfunctions.

13. Possible repair or resolution

  • If P1D03 returns after the erase-and-regular-charge test, TSB-20-54-003 directs replacement of the onboard charger/DC-DC converter.
  • If P1D03 does not return, the TSB classifies the result as an intermittent malfunction and refers to intermittent-malfunction procedures.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Mitsubishi TSB-20-54-003, published through NHTSA as Manufacturer Communication PDF 10175779 on 2020-04-22. It includes P1D03 diagnostic and repair direction.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified official source: NHTSA Manufacturer Communication PDF 10175779, Mitsubishi TSB-20-54-003: https://static.nhtsa.gov/odi/tsbs/2020/MC-10175779-9999.pdf

19. Frequently asked questions

What does Mitsubishi code P1D03 mean?

It means AC Input Current (High): the effective AC input current exceeded the maximum input-current value while charging was allowed by the EV-ECU and AC power was being supplied.

What happens when P1D03 sets?

The verified TSB states that charging is stopped.

What does the Mitsubishi TSB say to do if P1D03 returns?

After erasing the DTC and performing a regular charge, if the DTC is set again, the TSB directs replacement of the onboard charger/DC-DC converter.

Which vehicles are covered by the verified applicability evidence?

Mitsubishi i-MiEV model years 2012 through 2013 for the US region.

20. Sources & verification

Verified
Mitsubishi P1D03: AC Input Current (High) . TROUBLE JUDGMENT Check… | EV Diagnostics