Mitsubishi P1A43
ion battery starts to be charged. The control value of the main drive lithium-ion battery cur- rent sensor (high) is more than 20 amperes and less than 20 am pere
Quick answer
P1A43 is a Mitsubishi i-MiEV battery-current-sensor detection-circuit DTC documented for the 2016 US model. The supplied TSB identifies it as “BATT. Current SNS. Detect Circuit.”
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 P1A43 mean?
P1A43 is a Mitsubishi i-MiEV battery-current-sensor detection-circuit DTC documented for the 2016 US model. The supplied TSB identifies it as “BATT. Current SNS. Detect Circuit.”
2. Technical explanation
Verified TSB evidence states that the DTC judgment runs after 3 seconds from electric motor switch ON, or after 3 seconds from the main drive lithium-ion battery starts charging. The stated condition includes the control value of the main drive lithium-ion battery current sensor (high) being more than −20 A and less than 20 A. The supplied excerpt does not establish a complete plain-language failure mechanism beyond the DTC name and listed judgment condition.
3. What system is affected?
Main drive lithium-ion battery current-sensor detection circuit / BMU-related diagnostics.
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 official TSB diagnostic path distinguishes between a set DTC, for which it directs BMU replacement, and a DTC that is not set, which it identifies as an intermittent malfunction. No additional root causes are 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 suitable scan tool to confirm whether P1A43 is currently set, consistent with the official TSB diagnostic step.
- Have diagnosis and any repair performed by qualified EV service personnel. The supplied evidence concerns the main drive lithium-ion battery system.
10. Step-by-step troubleshooting
- Official TSB procedure: use scan tool MB991958 to check whether the diagnostic trouble code is set.
- If P1A43 is set, the TSB directs replacement of the BMU, referring to service manual section P.54D-188.
- If P1A43 is not set, the TSB identifies an intermittent malfunction and refers to Group 00 guidance for intermittent-malfunction troubleshooting/inspection service points.
11. When to contact service
Contact a Mitsubishi EV-qualified service facility for diagnosis, particularly if P1A43 is currently set. The official TSB directs BMU replacement when the code is confirmed set.
12. What the service center may check
- Confirm whether P1A43 is set using scan tool MB991958.
- Follow the official service information referenced by TSB-19-54-005 for BMU replacement when the DTC is set.
- If the DTC is not set, follow the intermittent-malfunction diagnostic guidance referenced by the TSB.
13. Possible repair or resolution
- When P1A43 is set, TSB-19-54-005 directs replacement of the BMU.
- When P1A43 is not set, the TSB classifies the result as an intermittent malfunction; a final repair is not established by the supplied evidence.
14. Affected vehicles
- Mitsubishi i-MiEV · 2016 · US
15. Related TSBs / service bulletins
- NHTSA Manufacturer Communication PDF 10158410: Mitsubishi TSB-19-54-005, published March 13, 2019. It includes the P1A43 diagnostic procedure and directs BMU replacement if the DTC is set.
16. Recall information
No recall relationship is established by verified evidence.
17. Official manufacturer information
Official source: NHTSA-hosted Mitsubishi TSB-19-54-005, https://static.nhtsa.gov/odi/tsbs/2019/MC-10158410-9999.pdf
19. Frequently asked questions
What does P1A43 mean?
The supplied Mitsubishi TSB labels P1A43 as “BATT. Current SNS. Detect Circuit.”
Which vehicle is verified as applicable?
Verified applicability is the 2016 Mitsubishi i-MiEV in the US.
What does the TSB say to do if P1A43 is set?
It directs replacement of the BMU, with a reference to service manual section P.54D-188.
Is it safe to drive or charge with P1A43?
Not yet established by verified evidence.