Mitsubishi P1B05
Return to Step 1. NO : The diagnosis is complete. DTC P1B06 Maximum cell temperature abnormality during charging CAUTION If there is any problem in the CAN bus lines, an incorrect
Quick answer
For the 2012, 2014, and 2016 US Mitsubishi i-MiEV, verified Mitsubishi service-bulletin evidence identifies P1B05 only within a post-repair charging verification: if P1B04, P1B05, or P1B07 is stored again after DTC erasure and charging, return to Step 1. The specific fault meaning of P1B05 is not yet established by verified evidence.
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 P1B05 mean?
For the 2012, 2014, and 2016 US Mitsubishi i-MiEV, verified Mitsubishi service-bulletin evidence identifies P1B05 only within a post-repair charging verification: if P1B04, P1B05, or P1B07 is stored again after DTC erasure and charging, return to Step 1. The specific fault meaning of P1B05 is not yet established by verified evidence.
2. Technical explanation
Verified Mitsubishi diagnostic material instructs technicians to erase stored DTCs, connect a regular/normal or quick-charging connector, charge the battery, and then check the EV-ECU again. If P1B04, P1B05, or P1B07 is stored/set again, the instruction is to return to Step 1; if not, diagnosis is complete. The supplied evidence also states that CAN-bus problems can cause an incorrect DTC and that CAN-bus lines must be diagnosed before the related diagnosis. It identifies communication between the battery-management unit (BMU) and EV-ECU via CAN. The supplied material specifically labels P1B06—not P1B05—as a maximum cell-temperature abnormality during charging / charging cell maximum temperature high.
3. What system is affected?
EV-ECU, BMU, and CAN communication are referenced by the verified evidence. The precise affected system for P1B05 is not yet established by verified evidence.
4. How serious is this code?
Unknown. Severity is not yet established by verified evidence.
5. Symptoms you may notice
Not yet established by verified evidence.
6. Possible causes
- A CAN-bus-line problem can result in an incorrect DTC, according to the supplied Mitsubishi diagnostic material.
- The specific cause of P1B05 is not yet established by verified evidence.
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 verified procedure includes charging as a technician diagnostic verification step after erasing DTCs.
9. What you can safely do
- Arrange diagnosis by a qualified Mitsubishi/EV service facility.
- Provide the stored DTC and vehicle model year to the service facility.
- Do not attempt high-voltage battery or CAN-system repair yourself.
10. Step-by-step troubleshooting
- Have the EV-ECU checked for stored DTCs.
- The verified Mitsubishi procedure includes erasing DTCs, charging with a regular/normal or quick-charging connector, and checking whether P1B04, P1B05, or P1B07 returns.
- If P1B05 returns during that verification, Mitsubishi's procedure directs the technician to return to Step 1.
- CAN-bus lines should be diagnosed before the related DTC diagnosis because a CAN issue can set an incorrect DTC.
11. When to contact service
Service evaluation is appropriate because the verified diagnostic procedure requires EV-ECU DTC checks and CAN-bus diagnosis. No urgency classification is established by the supplied evidence.
12. What the service center may check
- Check the EV-ECU for stored DTCs.
- Diagnose CAN-bus lines before the related diagnostic procedure.
- After DTC erasure, use charging as specified in Mitsubishi's verification procedure and recheck for P1B04, P1B05, or P1B07.
13. Possible repair or resolution
- If P1B04, P1B05, or P1B07 is not stored/set again after the prescribed verification, Mitsubishi's procedure states that diagnosis is complete.
- The repair needed if P1B05 returns is not yet established by verified evidence.
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
No recall relationship is established by verified evidence.
17. Official manufacturer information
Verified official source: NHTSA-hosted Mitsubishi manufacturer communications dated March 13, 2019. 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 Mitsubishi P1B05 mean?
The specific fault meaning of P1B05 is not yet established by the supplied verified evidence. The supplied documents identify P1B05 as one of the DTCs checked after a charging verification.
Which vehicles are covered by the supplied evidence?
US-market Mitsubishi i-MiEV model years 2012, 2014, and 2016.
Could a communication fault affect this DTC?
Yes. The supplied Mitsubishi diagnostic material states that a CAN-bus-line problem can cause an incorrect DTC and directs diagnosis of CAN-bus lines before the related procedure.