Mitsubishi P1C08
DCDC Rectifier Temperature DTC P1C09 DCDC Inside Temperature . TROUBLE JUDGMENT Check Conditions The EV-ECU allows the DC-DC converter to operate. Judgment Criterion The recti
Quick answer
For 2012–2013 Mitsubishi i-MiEV vehicles in the US, DTC P1C08 indicates that the DC-DC converter rectification-area temperature sensor detected more than 105°C (221°F) while the EV-ECU allowed DC-DC converter operation. The documented fail-safe stops DC-DC converter output.
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 P1C08 mean?
For 2012–2013 Mitsubishi i-MiEV vehicles in the US, DTC P1C08 indicates that the DC-DC converter rectification-area temperature sensor detected more than 105°C (221°F) while the EV-ECU allowed DC-DC converter operation. The documented fail-safe stops DC-DC converter output.
2. Technical explanation
Verified Mitsubishi service information identifies P1C08 as a DC-DC rectifier-temperature DTC. It sets when the rectification-area temperature sensor exceeds 105°C (221°F), under the condition that the EV-ECU permits DC-DC converter operation. The documented backup/fail-safe function is stoppage of DC-DC converter output.
3. What system is affected?
DC-DC converter / EV-ECU thermal-monitoring and cooling-related system.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- DC-DC converter output is stopped when the documented fail-safe is active.
6. Possible causes
- EV-ECU failure.
- Insufficient coolant.
- Water-pump failure.
- Radiator-fan failure.
- Temperature sensor in the DC-DC converter: the supplied evidence is truncated before its full stated condition or diagnosis.
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
- Do not perform high-voltage repair procedures.
- Arrange diagnosis using Mitsubishi service information or a qualified EV service provider.
10. Step-by-step troubleshooting
- Verify the code and diagnose it using the Mitsubishi troubleshooting and inspection procedures referenced in TSB-20-54-003.
- The verified source directs technicians to use Troubleshooting/Inspection Service Points and procedures for intermittent malfunctions.
11. When to contact service
Service by a qualified Mitsubishi/EV technician is appropriate because the documented fail-safe stops DC-DC converter output and the listed possible causes include cooling-system, sensor, and EV-ECU concerns.
12. What the service center may check
- Check the documented possible causes: EV-ECU, coolant quantity, water pump, radiator fan, and the DC-DC converter temperature-sensor circuit/component as applicable under the manufacturer procedure.
- Confirm whether the P1C08 judgment criterion—rectification-area temperature above 105°C (221°F)—is present, following manufacturer diagnostic procedures.
13. Possible repair or resolution
- Not yet established by verified evidence. The supplied TSB excerpt identifies diagnostic causes but does not establish a specific repair.
14. Affected vehicles
- Mitsubishi i-MiEV · 2012–2013 · US
15. Related TSBs / service bulletins
- Mitsubishi TSB-20-54-003, published April 22, 2020; NHTSA Manufacturer Communication PDF 10175779. It documents P1C08 judgment conditions, the 105°C (221°F) threshold, DC-DC output stoppage, and listed probable causes.
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 P1C08 mean on a Mitsubishi i-MiEV?
For the verified 2012–2013 US i-MiEV applicability, P1C08 is a DC-DC rectifier-temperature DTC. It is set when the rectification-area temperature sensor is above 105°C (221°F) while DC-DC converter operation is enabled by the EV-ECU.
What happens when P1C08 sets?
The documented fail-safe stops DC-DC converter output.
What can cause P1C08?
The supplied official TSB lists EV-ECU failure, insufficient coolant, water-pump failure, and radiator-fan failure. The source excerpt also begins listing the DC-DC converter temperature sensor, but the supplied evidence is truncated before the complete statement.