Mitsubishi P1C02
DCDC Output Voltage Abnormal DTC P1C22 DCDC Output Voltage Abnormal (2) . TROUBLE JUDGMENT Check Conditions The EV-ECU allows the DC-DC converter to operate. Judgment Criterion
Quick answer
For 2012–2013 Mitsubishi i‑MiEV vehicles in the US, DTC P1C02 indicates an abnormal DC-DC converter output voltage. The verified judgment criterion is B-terminal output voltage above 16.0 V while the EV-ECU allows DC-DC converter operation. The documented fail-safe stops DC-DC converter output.
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1. What does P1C02 mean?
For 2012–2013 Mitsubishi i‑MiEV vehicles in the US, DTC P1C02 indicates an abnormal DC-DC converter output voltage. The verified judgment criterion is B-terminal output voltage above 16.0 V while the EV-ECU allows DC-DC converter operation. The documented fail-safe stops DC-DC converter output.
2. Technical explanation
The EV-ECU monitors DC-DC converter operation. P1C02 is judged when the DC-DC converter output, measured at the B terminal, exceeds 16.0 V. The manufacturer service information identifies DC-DC converter failure as the probable cause. The same source also discusses P1C22 as a separate DC-DC output-voltage-abnormal DTC, but P1C22 uses a different stated criterion: detection of a failure in the output-section overvoltage abnormal-detection circuit for predetermined times or more.
3. What system is affected?
DC-DC converter output section and EV-ECU monitoring.
4. How serious is this code?
Not yet established by verified evidence. However, the documented fail-safe stops DC-DC converter output when this fault is present.
5. Symptoms you may notice
- The DC-DC converter output is stopped by the documented fail-safe function.
6. Possible causes
- DC-DC converter failure.
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
- Arrange diagnosis by a qualified Mitsubishi EV service provider.
- Do not attempt high-voltage or DC-DC converter repair procedures yourself.
10. Step-by-step troubleshooting
- Use appropriate manufacturer diagnostic procedures to recheck whether the DTC is set.
- Verify DC-DC converter output-voltage operation under the stated check condition: the EV-ECU allows DC-DC converter operation.
- For P1C02, the verified judgment threshold is B-terminal voltage greater than 16.0 V.
11. When to contact service
Service is appropriate because the manufacturer information identifies a failed DC-DC converter as the probable cause and states that the fail-safe stops converter output.
12. What the service center may check
- Recheck for the diagnostic trouble code.
- Assess DC-DC converter output voltage at the B terminal under the specified operating condition.
- Diagnose the DC-DC converter in accordance with Mitsubishi service information.
13. Possible repair or resolution
- Not yet established by verified evidence. The verified source identifies DC-DC converter failure as the probable cause but does not provide a confirmed repair outcome in the supplied evidence.
14. Affected vehicles
- Mitsubishi i-MiEV · 2012–2013 · US
15. Related TSBs / service bulletins
- Mitsubishi TSB-20-54-003, published through NHTSA on 2020-04-22 (NHTSA Manufacturer Communication PDF 10175779). It documents P1C02 DC-DC output voltage abnormal diagnosis for the applicable vehicle information supplied.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Verified 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 P1C02 mean on a Mitsubishi i-MiEV?
For the verified 2012–2013 US i-MiEV applicability, it means DC-DC converter output voltage abnormal. The stated P1C02 criterion is B-terminal voltage above 16.0 V while the EV-ECU permits DC-DC converter operation.
What happens when P1C02 is detected?
The documented fail-safe and backup function stops DC-DC converter output.
What is the documented probable cause of P1C02?
The supplied Mitsubishi service evidence identifies DC-DC converter failure as the probable cause.
Is P1C02 the same as P1C22?
No. The source groups both as DC-DC output-voltage-abnormal DTCs but gives different judgment criteria. P1C02 is associated with output voltage above 16.0 V; P1C22 is associated with an output-section overvoltage abnormal-detection-circuit failure detected for predetermined times or more.