Mitsubishi P1B33
Go to Step 2. STEP 2. Scan tool MB991958 data list (1) Check the domestic power supply facility. (2) Connect the regular charging cable. (3) Check service data. Item No. 6: Minim
Quick answer
For a 2012 Mitsubishi i-MiEV sold in the US, P1B33 is referenced in Mitsubishi TSB-19-54-003 as a diagnostic path involving the EV-ECU and main drive lithium-ion battery diagnosis. The supplied evidence does not establish a complete code definition, severity, drivability, chargeability, or a specific failed component.
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 P1B33 mean?
For a 2012 Mitsubishi i-MiEV sold in the US, P1B33 is referenced in Mitsubishi TSB-19-54-003 as a diagnostic path involving the EV-ECU and main drive lithium-ion battery diagnosis. The supplied evidence does not establish a complete code definition, severity, drivability, chargeability, or a specific failed component.
2. Technical explanation
The verified source directs a technician to first use scan tool MB991958 to check whether EV-ECU DTCs P1A30, P1A31, or P1A33 are stored. If they are not stored, the next step is to check the domestic power-supply facility, connect the regular charging cable, and review scan-tool service data. The listed data items are Item No. 6, Minimum voltage cell ID, and Item No. 33, Maximum value of cell voltage difference. The source specifies an acceptable maximum cell-voltage difference of 0.2 V or less under the stated conditions, including electric motor switch ON and the combination-meter energy-level gauge condition described in the bulletin excerpt.
3. What system is affected?
The supplied bulletin places this procedure under unit and main drive lithium-ion battery diagnosis and refers to EV-ECU diagnostic information.
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 diagnostic procedure instructs checking the domestic power-supply facility.
- The diagnostic procedure instructs connecting the regular charging cable.
- The procedure evaluates minimum-voltage cell identification and maximum cell-voltage difference.
- No specific component failure or root cause is established by the supplied 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.
9. What you can safely do
- Use a qualified Mitsubishi EV service facility for diagnosis with the specified scan tool.
- Do not attempt high-voltage battery diagnosis or repair without appropriate qualified service procedures.
- If charging behavior is abnormal, the bulletin evidence supports checking the domestic power-supply facility and using the regular charging cable during professional diagnosis.
10. Step-by-step troubleshooting
- Use scan tool MB991958 to check whether EV-ECU DTCs P1A30, P1A31, or P1A33 are stored.
- If those DTCs are not stored, check the domestic power-supply facility.
- Connect the regular charging cable.
- Review service-data Item No. 6: Minimum voltage cell ID.
- Review service-data Item No. 33: Maximum value of cell voltage difference.
- The bulletin excerpt specifies a maximum cell-voltage difference of 0.2 V or less as OK under its stated test conditions.
11. When to contact service
Service is appropriate because the verified procedure requires scan tool MB991958 and EV-ECU/main drive lithium-ion battery diagnostic data. Urgency is not yet established by verified evidence.
12. What the service center may check
- Check EV-ECU for DTCs P1A30, P1A31, and P1A33.
- Check the domestic power-supply facility.
- Connect the regular charging cable.
- Read Minimum voltage cell ID, Item No. 6.
- Read Maximum value of cell voltage difference, Item No. 33.
- Compare the maximum cell-voltage difference with the bulletin’s stated 0.2 V-or-less criterion under the specified conditions.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Mitsubishi i-MiEV · 2012 · US
15. Related TSBs / service bulletins
- Mitsubishi TSB-19-54-003, published through NHTSA as Manufacturer Communication PDF 10158408 on March 13, 2019. The supplied excerpt contains the EV-ECU and main drive lithium-ion battery diagnostic procedure referenced for P1B33.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Verified official source: NHTSA Manufacturer Communication PDF 10158408, Mitsubishi TSB-19-54-003: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf
19. Frequently asked questions
What vehicle is covered by the supplied evidence?
The supplied applicability evidence identifies the 2012 Mitsubishi i-MiEV for the US market.
What scan tool does the procedure specify?
The bulletin specifies scan tool MB991958.
What battery data does the procedure review?
It lists Minimum voltage cell ID (Item No. 6) and Maximum value of cell voltage difference (Item No. 33).
What cell-voltage-difference value is listed as OK?
The supplied bulletin excerpt lists 0.2 V or less under the stated test conditions.
Does the evidence confirm that P1B33 makes the vehicle unsafe to drive or charge?
No. Drive safety and charge safety are not yet established by verified evidence.