Mitsubishi P1C19
DCDC Low Temperature . TROUBLE JUDGMENT Check Condition The EV-ECU allows the DC-DC converter to operate. Judgment Criterion The temperature difference between the rectifier an
Quick answer
P1C19 is a Mitsubishi i-MiEV DC-DC converter low-temperature diagnostic code. Verified evidence applies to US-model-year 2012–2013 vehicles and directs replacement of the on-board charger/DC-DC converter if the DTC resets during the specified check.
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 P1C19 mean?
P1C19 is a Mitsubishi i-MiEV DC-DC converter low-temperature diagnostic code. Verified evidence applies to US-model-year 2012–2013 vehicles and directs replacement of the on-board charger/DC-DC converter if the DTC resets during the specified check.
2. Technical explanation
The verified judgment condition is a temperature difference between the rectifier and the internal DC-DC converter temperature sensor of less than -70°C (-158°F) or greater than 70°C (158°F), while the EV-ECU allows DC-DC converter operation.
3. What system is affected?
DC-DC converter within the on-board charger/DC-DC converter assembly.
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
- A DTC that is set again during the specified verification check is addressed by replacement of the on-board charger/DC-DC converter, according to TSB-20-54-003.
- If the DTC is not set during the specified check, the bulletin identifies an intermittent malfunction.
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 facility.
- Do not attempt high-voltage component removal or repair yourself.
10. Step-by-step troubleshooting
- The bulletin’s excerpt directs checking whether the DTC is set after the specified key-position procedure.
- If P1C19 is set, TSB-20-54-003 directs replacement of the on-board charger/DC-DC converter.
- If P1C19 is not set, the bulletin directs intermittent-malfunction troubleshooting procedures.
11. When to contact service
Contact a Mitsubishi EV-qualified service facility if P1C19 is present or returns after clearing.
12. What the service center may check
- Confirm whether DTC P1C19 is set using the procedure specified in TSB-20-54-003.
- If it is set, replace the on-board charger/DC-DC converter as directed by the bulletin.
- If it is not set, follow the bulletin’s intermittent-malfunction diagnostic guidance.
13. Possible repair or resolution
- Replace the on-board charger/DC-DC converter when P1C19 is confirmed set under the TSB verification procedure.
- For a DTC that does not reset during that procedure, investigate as an intermittent malfunction.
14. Affected vehicles
- Mitsubishi i-MiEV · 2012–2013 · US
15. Related TSBs / service bulletins
- TSB-20-54-003, published April 22, 2020: includes P1C19 diagnostic guidance and directs on-board charger/DC-DC converter replacement when the DTC is set during the specified check.
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 P1C19 mean?
For the applicable Mitsubishi i-MiEV, P1C19 is identified as “DCDC Low Temperature.” The verified criterion concerns an implausible temperature difference between the rectifier and the internal DC-DC converter temperature sensor.
Which vehicles are covered by the verified evidence?
Mitsubishi i-MiEV, US market, model years 2012–2013.
What repair does the bulletin specify?
When P1C19 is set during the bulletin’s verification check, it specifies replacement of the on-board charger/DC-DC converter.
Is it safe to drive or charge with P1C19?
Not yet established by verified evidence.