Mitsubishi P1C22
ECU allows the DC-DC converter to operate. Judgment Criterion The output (B terminal) voltage is more than 16.0 V. <P1C02> The system detects a failure "overvoltage abnormal de
Quick answer
For 2012–2013 Mitsubishi i-MiEV vehicles in the US, DTC P1C22 indicates a DC-DC converter output-voltage abnormality. The cited Mitsubishi service bulletin states that the DC-DC converter output is stopped as a fail-safe response.
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 P1C22 mean?
For 2012–2013 Mitsubishi i-MiEV vehicles in the US, DTC P1C22 indicates a DC-DC converter output-voltage abnormality. The cited Mitsubishi service bulletin states that the DC-DC converter output is stopped as a fail-safe response.
2. Technical explanation
The verified bulletin describes P1C22 as “DCDC Output Voltage Abnormal (2).” The EV-ECU allows DC-DC converter operation, and P1C22 is judged when the system detects a failure in the output-section “overvoltage abnormal detection circuit” for a predetermined time or longer. The same bulletin identifies a DC-DC converter failure as the probable cause.
3. What system is affected?
DC-DC converter and its output section / B-terminal voltage monitoring.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
Not yet established by verified evidence.
6. Possible causes
- The official Mitsubishi bulletin lists DC-DC converter failure as the probable cause.
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 professional diagnosis by a Mitsubishi-capable EV service facility.
- Do not attempt high-voltage or DC-DC converter repair yourself.
10. Step-by-step troubleshooting
- The official bulletin’s first diagnostic step is to recheck whether the DTC resets in the DC-DC converter after clearing the DTC and cycling the electric motor switch from LOCK (OFF) to ON and then START.
- Further diagnostic and repair procedures are not established by the supplied verified evidence.
11. When to contact service
Service is recommended because the official bulletin identifies a DC-DC converter failure as the probable cause and states that converter output is stopped under the fail-safe function.
12. What the service center may check
- Confirm whether P1C22 resets in the DC-DC converter after the bulletin’s specified DTC-clear and power-switch cycle.
- Diagnose the DC-DC converter according to applicable Mitsubishi service information.
13. Possible repair or resolution
- Not yet established by 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. It includes P1C22 DC-DC converter output-voltage abnormal diagnostic information.
16. Recall information
No recall relationship is established by verified evidence.
17. Official manufacturer information
Verified 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 P1C22 mean on a Mitsubishi i-MiEV?
The verified Mitsubishi bulletin identifies P1C22 as “DCDC Output Voltage Abnormal (2)” and describes detection of an output-section overvoltage abnormal-detection-circuit failure for a predetermined time or longer.
What does the vehicle do when P1C22 is set?
The bulletin states that the DC-DC converter output is stopped as the fail-safe and backup function.
What vehicles are covered by the supplied evidence?
The supplied applicability evidence identifies US-market 2012–2013 Mitsubishi i-MiEV vehicles.
What is the listed probable cause?
The bulletin lists DC-DC converter failure as the probable cause.