Mitsubishi P1B00
ECU. (1) Erase the stored DTC. (2) Connect the quick charging connector to charg e the battery fully. (3) Check if the DTC is stored. Q: Is the DTC stored? YES <DTC P1AFA> : Go to
Quick answer
For verified U.S.-market 2012, 2014, and 2016 Mitsubishi i-MiEV applicability, P1B00 is an EV-ECU DTC addressed in Mitsubishi TSB diagnostic procedures. The supplied evidence does not establish a plain-language fault definition, severity, drivability, charging safety, or a specific repair.
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 P1B00 mean?
For verified U.S.-market 2012, 2014, and 2016 Mitsubishi i-MiEV applicability, P1B00 is an EV-ECU DTC addressed in Mitsubishi TSB diagnostic procedures. The supplied evidence does not establish a plain-language fault definition, severity, drivability, charging safety, or a specific repair.
2. Technical explanation
Mitsubishi TSB-19-54-003, TSB-19-54-004, and TSB-19-54-005 include P1B00 in an EV-ECU DTC recheck after resetting CAN bus lines. The documented procedure is to erase the DTC, connect the quick-charging connector to charge the battery fully/completely, and check whether the DTC returns. If P1B00 is still stored/set, the referenced procedures direct technicians to Step 15 in TSB-19-54-003/004 or Step 17 in TSB-19-54-005. If it does not return, the diagnosis is complete. The supplied excerpts do not include those later steps or establish the underlying fault mechanism.
3. What system is affected?
EV-ECU. The supplied evidence also places the procedure within Mitsubishi documentation for the electric motor unit and main drive lithium-ion battery.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- A stored or set P1B00 DTC in the EV-ECU is established by the supplied TSB evidence.
- Other vehicle symptoms are not yet established by verified evidence.
6. Possible causes
- Not yet established by verified evidence. The supplied excerpts provide a diagnostic recheck path but do not identify a confirmed root cause for P1B00.
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. The TSB procedure instructs a technician to connect the quick-charging connector for a full/completed charge as part of diagnosis, but this does not establish general charging safety for every vehicle with P1B00.
9. What you can safely do
- Have the vehicle evaluated using Mitsubishi’s applicable EV-ECU diagnostic procedure.
- Do not attempt high-voltage connector, relay, wiring, or battery testing yourself.
- Record whether P1B00 returns after service diagnosis.
10. Step-by-step troubleshooting
- In the Mitsubishi procedure, erase the stored/set DTC.
- Connect the quick-charging connector and charge the battery fully/completely.
- Recheck whether P1B00 is stored/set in the EV-ECU.
- If P1B00 does not return, the cited procedure states that diagnosis is complete.
- If P1B00 returns, follow the applicable Mitsubishi TSB continuation: Step 15 in TSB-19-54-003 or TSB-19-54-004, or Step 17 in TSB-19-54-005. Those steps are not included in the supplied evidence.
11. When to contact service
Service is appropriate because the verified procedure involves EV-ECU diagnosis and quick-charging equipment. The supplied evidence does not establish whether service is immediately required.
12. What the service center may check
- Check the EV-ECU for P1B00 after the documented erase-and-recheck procedure.
- Use the applicable Mitsubishi TSB continuation if P1B00 returns.
- In TSB-19-54-005, the supplied excerpt also directs a scan-tool check for EV-ECU DTCs P1019, P101A, P102E, and P102F during the P1AFA branch; this is not established as a P1B00-specific check from the supplied excerpt.
13. Possible repair or resolution
- If P1B00 does not return after the documented recheck, the cited procedure states that diagnosis is complete.
- The repair or corrective action if P1B00 returns is not yet established by the supplied evidence because the referenced later TSB steps were not provided.
14. Affected vehicles
- Mitsubishi i-MiEV · 2012 · US
- Mitsubishi i-MiEV · 2014 · US
- Mitsubishi i-MiEV · 2016 · US
15. Related TSBs / service bulletins
- Mitsubishi TSB-19-54-003, published March 13, 2019; NHTSA manufacturer communication MC-10158408-9999.
- Mitsubishi TSB-19-54-004, published March 13, 2019; NHTSA manufacturer communication MC-10158409-9999.
- Mitsubishi TSB-19-54-005, published March 13, 2019; NHTSA manufacturer communication MC-10158410-9999.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Official NHTSA-hosted Mitsubishi communications: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf ; https://static.nhtsa.gov/odi/tsbs/2019/MC-10158409-9999.pdf ; https://static.nhtsa.gov/odi/tsbs/2019/MC-10158410-9999.pdf
19. Frequently asked questions
What does P1B00 mean on a Mitsubishi i-MiEV?
The supplied evidence establishes P1B00 as an EV-ECU DTC included in Mitsubishi diagnostic procedures. A plain-language fault definition is not yet established by verified evidence.
Which vehicles are verified as applicable?
U.S.-market Mitsubishi i-MiEV model years 2012, 2014, and 2016 are verified by the supplied applicability data.
What happens if P1B00 does not return after the recheck?
The cited Mitsubishi procedures state that diagnosis is complete.
Can I drive or charge the vehicle with P1B00?
Not yet established by verified evidence.