Mitsubishi P1D09
1.0 A. <P1D10> . FAIL-SAFE AND BACKUP FUNCTION The charge is stopped. . PROBABLE CAUSES The EV-ECU is failed. The on board charger is failed. DIAGNOSIS STEP 1. Use scan tool
Quick answer
For a 2012–2013 Mitsubishi i-MiEV (US), DTC P1D09 is an onboard-charging control fault. Verified Mitsubishi service information states that charging is stopped when this code is set.
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 P1D09 mean?
For a 2012–2013 Mitsubishi i-MiEV (US), DTC P1D09 is an onboard-charging control fault. Verified Mitsubishi service information states that charging is stopped when this code is set.
2. Technical explanation
The verified TSB describes P1D09 under an onboard-charger control-fail condition. The judgment criterion is met when AC input is 100 V and output current is more than 7.0 A, or when AC input is 200 V and output current is more than 10.0 A. The same source distinguishes P1D10 as a target-versus-output current difference greater than 1.0 A or less than -1.0 A.
3. What system is affected?
Onboard charging system, including the EV-ECU and onboard charger.
4. How serious is this code?
Severity is not yet established by verified evidence. The verified fail-safe action is that charging is stopped.
5. Symptoms you may notice
- Charging is stopped.
6. Possible causes
- EV-ECU failure.
- Onboard charger failure.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
The verified fail-safe function states that charging is stopped. Whether charging can resume or be safely attempted is not yet established by verified evidence.
9. What you can safely do
- Do not attempt high-voltage diagnosis or repair.
- Have the vehicle evaluated with the specified scan tool by qualified service personnel.
10. Step-by-step troubleshooting
- Use scan tool MB991958 to confirm the DTC, as specified in the verified service information.
11. When to contact service
Service evaluation is appropriate because the verified diagnostic procedure begins with scan-tool confirmation and identifies the EV-ECU and onboard charger as probable causes.
12. What the service center may check
- Confirm the DTC using scan tool MB991958.
- Evaluate the EV-ECU and onboard charger following the applicable Mitsubishi diagnostic procedure.
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
- NHTSA Manufacturer Communication PDF 10175779: TSB-20-54-003, published April 22, 2020. It documents the P1D09 charging-control judgment criteria, charge-stop fail-safe function, probable causes, and initial scan-tool diagnostic step.
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 P1D09 mean on a Mitsubishi i-MiEV?
For the verified 2012–2013 US i-MiEV application, it indicates an onboard-charger control-fail condition meeting the documented output-current threshold at either 100 V or 200 V AC input.
What happens when P1D09 sets?
The verified fail-safe action is that charging is stopped.
What can cause P1D09?
The verified probable causes are EV-ECU failure or onboard-charger failure.
What is the first diagnostic step?
The verified procedure says to use scan tool MB991958 to confirm the DTC.