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Mitsubishi P1D23

Power Circuit (Pre-charge fail) . 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 inpu

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence. The code’s published check conditions occur while AC power is being input and charging is allowed by the EV-ECU.
ServiceContact a qualified Mitsubishi EV service facility, particularly if P1D23 returns after the specified erase-and-regular-charge check.
Confidence95%

Quick answer

P1D23 is a Mitsubishi i-MiEV onboard-charger diagnostic trouble code for “Power Circuit (Pre-charge fail).” Verified applicability is 2012–2013 U.S. i-MiEV vehicles.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

Video guides

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✅ Mitsubishi Outlander PHEV Code P1D23 FIXED! | Onboard Charger Repair ExplainedCarsupkeep

Videos are supporting material and never override OEM or regulator evidence.

1. What does P1D23 mean?

P1D23 is a Mitsubishi i-MiEV onboard-charger diagnostic trouble code for “Power Circuit (Pre-charge fail).” Verified applicability is 2012–2013 U.S. i-MiEV vehicles.

2. Technical explanation

Mitsubishi’s published diagnostic information states that P1D23 can be judged while charging is permitted by the EV-ECU and AC power is being supplied. The stated judgment criterion is that power-factor-improvement-circuit voltage exceeds the overcurrent-detection signal by a predetermined multiple.

3. What system is affected?

Onboard charger / DC-DC converter power circuit, including the pre-charge function.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • The DTC may be stored during an attempted regular charge. No additional driver-visible symptoms are established by verified evidence.

6. Possible causes

  • The official diagnostic procedure distinguishes between a repeatable fault and an intermittent malfunction after the DTC is erased and regular charging is attempted again. A more specific component-level cause is not established by the supplied 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. The code’s published check conditions occur while AC power is being input and charging is allowed by the EV-ECU.

9. What you can safely do

  • Do not attempt high-voltage diagnosis or repair yourself.
  • Have a qualified Mitsubishi EV service facility assess a repeatable P1D23 fault.
  • Record whether the code returns after a normal charging attempt, if this can be checked using appropriate professional diagnostic equipment.

10. Step-by-step troubleshooting

  1. Mitsubishi’s TSB procedure instructs technicians to erase the DTC.
  2. Perform a regular charge.
  3. Check whether P1D23 is set again.
  4. If the code returns, the TSB directs replacement of the onboard charger/DC-DC converter.
  5. If the code does not return, the TSB identifies the condition as an intermittent malfunction and refers technicians to Mitsubishi intermittent-malfunction diagnostic procedures.

11. When to contact service

Contact a qualified Mitsubishi EV service facility, particularly if P1D23 returns after the specified erase-and-regular-charge check.

12. What the service center may check

  • Confirm the DTC is erased.
  • Perform a regular charging event.
  • Recheck for P1D23.
  • If it resets, follow the manufacturer-directed onboard charger/DC-DC converter replacement path.
  • If it does not reset, investigate as an intermittent malfunction using the manufacturer’s diagnostic process.

13. Possible repair or resolution

  • For a repeatable P1D23 after the erase-and-regular-charge check, Mitsubishi TSB-20-54-003 directs replacement of the onboard charger/DC-DC converter.
  • If P1D23 does not reset after the check, Mitsubishi identifies it as an intermittent malfunction; a final repair is not established by the supplied evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Mitsubishi TSB-20-54-003, published April 22, 2020, includes the P1D23 diagnostic procedure and directs replacement of the onboard charger/DC-DC converter when the DTC resets after the specified check.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

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

19. Frequently asked questions

What does Mitsubishi P1D23 mean?

It means “Power Circuit (Pre-charge fail)” in the onboard charging system diagnostic information.

Which vehicles are verified as applicable?

The supplied evidence verifies applicability to U.S.-market 2012–2013 Mitsubishi i-MiEV vehicles.

What does Mitsubishi direct if P1D23 returns?

After erasing the DTC and performing a regular charge, Mitsubishi directs replacement of the onboard charger/DC-DC converter if P1D23 is set again.

What if P1D23 does not return after the check?

Mitsubishi identifies it as an intermittent malfunction and refers technicians to its intermittent-malfunction diagnostic procedures.

20. Sources & verification

Verified
Mitsubishi P1D23: Power Circuit (Pre-charge fail) . TROUBLE JUDGMENT… | EV Diagnostics