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Mitsubishi P1D42

Temperature Sensor TSB-20-54-003 Page 48 of 95 PROBABLE CAUSE  The on board charger is failed. DIAGNOSIS STEP 1. Recheck for diagnostic trouble code. Check again if the DTC is set

DriveNot yet established by verified evidence.
ChargeThe verified bulletin states that charging is stopped as a fail-safe function when this condition is detected.
ServiceService is appropriate if P1D42 is present or resets after the bulletin’s diagnostic confirmation procedure. The verified repair direction involves the on-board charger/DC-DC converter assembly.
Confidence95%

Quick answer

For a 2012–2013 Mitsubishi i-MiEV in the US, DTC P1D42 is identified in Mitsubishi TSB-20-54-003 as “Temperature Sensor.” The verified bulletin states that charging is stopped as a fail-safe function and lists a failed on-board charger as the probable cause.

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 P1D42 mean?

For a 2012–2013 Mitsubishi i-MiEV in the US, DTC P1D42 is identified in Mitsubishi TSB-20-54-003 as “Temperature Sensor.” The verified bulletin states that charging is stopped as a fail-safe function and lists a failed on-board charger as the probable cause.

2. Technical explanation

The available official evidence is Mitsubishi TSB-20-54-003, published through NHTSA. Its diagnostic procedure directs technicians to erase the DTC, perform a regular charge, and check whether P1D42 resets in the on-board charger. If it resets, the bulletin directs replacement of the on-board charger/DC-DC converter assembly.

3. What system is affected?

On-board charger / DC-DC converter assembly.

4. How serious is this code?

Not yet established by verified evidence. The bulletin does verify that charging is stopped when this fault condition is detected.

5. Symptoms you may notice

  • Charging is stopped by the vehicle fail-safe function.
  • P1D42 may reset after the DTC is cleared and a regular charge is performed.

6. Possible causes

  • The on-board charger is failed, according to Mitsubishi TSB-20-54-003.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

The verified bulletin states that charging is stopped as a fail-safe function when this condition is detected.

9. What you can safely do

  • Arrange diagnosis by a qualified Mitsubishi EV service provider.
  • Do not attempt high-voltage diagnosis or repair of the on-board charger/DC-DC converter yourself.

10. Step-by-step troubleshooting

  1. A technician should recheck whether P1D42 is set in the on-board charger.
  2. The bulletin procedure is to erase the DTC, perform a regular charge, and check whether the DTC resets.

11. When to contact service

Service is appropriate if P1D42 is present or resets after the bulletin’s diagnostic confirmation procedure. The verified repair direction involves the on-board charger/DC-DC converter assembly.

12. What the service center may check

  • Confirm P1D42 in the on-board charger.
  • Clear the DTC.
  • Perform a regular charge.
  • Recheck whether P1D42 resets.
  • If it resets, follow the bulletin’s replacement direction for the on-board charger/DC-DC converter assembly.

13. Possible repair or resolution

  • If P1D42 resets after clearing the code and performing a regular charge, Mitsubishi TSB-20-54-003 directs replacement of the on-board charger/DC-DC converter assembly.

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 P1D42 diagnostic information on page 48 of 95.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

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 P1D42 mean?

For the verified 2012–2013 US Mitsubishi i-MiEV application, TSB-20-54-003 identifies P1D42 as “Temperature Sensor.”

What does P1D42 affect?

The verified bulletin identifies the on-board charger/DC-DC converter assembly and states that charging is stopped as a fail-safe function.

What repair does the bulletin direct if P1D42 returns?

After clearing the DTC and performing a regular charge, if P1D42 resets, TSB-20-54-003 directs replacement of the on-board charger/DC-DC converter assembly.

Can the vehicle be driven with P1D42?

Not yet established by verified evidence.

20. Sources & verification

Verified
Mitsubishi P1D42: Temperature Sensor TSB-20-54-003 Page 48 of 95… | EV Diagnostics