Mitsubishi P1D27
: Inverter Output Current TSB-20-54-003 Page 43 of 95 FAIL-SAFE AND BACKUP FUNCTION The charge is stopped. . PROBABLE CAUSES The EV-ECU is failed. There is not en
Quick answer
For U.S.-market 2012–2013 Mitsubishi i-MiEV vehicles, verified evidence links DTC P1D27 to an on-board-charger temperature condition: the rectification-area coil temperature sensor is more than 110°C (230°F). The documented fail-safe action is that charging stops.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
Watch Videos
Relevant videos play here without leaving this diagnostic page.
No sufficiently relevant embeddable video has been accepted for this diagnostic yet.
Videos are supporting material and never override OEM or regulator evidence.
1. What does P1D27 mean?
For U.S.-market 2012–2013 Mitsubishi i-MiEV vehicles, verified evidence links DTC P1D27 to an on-board-charger temperature condition: the rectification-area coil temperature sensor is more than 110°C (230°F). The documented fail-safe action is that charging stops.
2. Technical explanation
The supplied NHTSA-published Mitsubishi communication, TSB-20-54-003, identifies P1D27 under on-board-charger diagnostic conditions. The DTC sets while charging is permitted by the EV-ECU when the rectification-area coil temperature sensor exceeds 110°C (230°F). The source excerpt also states that charging is stopped as the fail-safe/back-up function.
3. What system is affected?
On-board charging system, including the rectification-area coil temperature sensing condition and EV-ECU charging authorization.
4. How serious is this code?
Unknown. The verified evidence establishes that charging stops, but does not provide a severity rating.
5. Symptoms you may notice
- Charging stops.
- P1D27 may be stored while the on-board charger is allowed to charge by the EV-ECU.
6. Possible causes
- The verified source establishes an over-110°C (230°F) reading from the rectification-area coil temperature sensor as the DTC judgment criterion.
- The supplied excerpt is truncated after listing probable causes; additional causes are 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?
No while the documented fail-safe function is active: the verified source states that charging is stopped.
9. What you can safely do
- Stop attempting to charge if charging has stopped and arrange qualified Mitsubishi EV diagnosis.
- Use the NHTSA-published Mitsubishi TSB as the reference for diagnosis.
- Do not attempt high-voltage or on-board-charger repair procedures without qualified EV service training.
10. Step-by-step troubleshooting
- Confirm the stored DTC with appropriate diagnostic equipment.
- Review the on-board-charger temperature-related diagnostic information in Mitsubishi TSB-20-54-003.
- Further troubleshooting steps are not yet established by the supplied verified evidence.
11. When to contact service
Contact a qualified Mitsubishi EV service provider if P1D27 is present or charging stops.
12. What the service center may check
- Check P1D27 using appropriate diagnostic equipment.
- Assess the documented rectification-area coil temperature-sensor condition in accordance with Mitsubishi TSB-20-54-003.
- Any further service checks are not yet established by verified evidence.
13. Possible repair or resolution
- A specific repair resolution is not yet established by the supplied verified evidence.
14. Affected vehicles
- Mitsubishi i-MiEV · 2012–2013 · US
15. Related TSBs / service bulletins
- Mitsubishi TSB-20-54-003, published through NHTSA as Manufacturer Communication PDF 10175779 on April 22, 2020. The supplied evidence identifies P1D27 and states that charging stops when the rectification-area coil temperature sensor exceeds 110°C (230°F).
16. Recall information
- No recall information is established by the supplied verified evidence.
17. Official manufacturer information
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 i-MiEV code P1D27 mean?
For the covered vehicle application, verified evidence identifies P1D27 when the on-board charger's rectification-area coil temperature sensor is more than 110°C (230°F).
What happens when P1D27 occurs?
The documented fail-safe/back-up function is that charging is stopped.
Can I drive with P1D27?
Not yet established by verified evidence.
Which vehicles are covered by the supplied evidence?
Mitsubishi i-MiEV, model years 2012–2013, U.S. region.