Mitsubishi P1A42
Power supply circuit of Main Drive Lithium-ion Battery current sensor abnormal b. P1A40: Main Drive Lithium-ion Battery current sensor (high) a bnormal c. P1A41: Main Drive Lithium
Quick answer
P1A42 is identified in verified Mitsubishi service-bulletin evidence as an abnormal power-supply circuit condition for the Main Drive Lithium-ion Battery current sensor.
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 P1A42 mean?
P1A42 is identified in verified Mitsubishi service-bulletin evidence as an abnormal power-supply circuit condition for the Main Drive Lithium-ion Battery current sensor.
2. Technical explanation
Verified bulletin evidence lists P1A42 as: “Power supply circuit of Main Drive Lithium-ion Battery current sensor abnormal.” The supplied evidence also distinguishes P1A40 as a high-range current-sensor abnormality and P1A41 as a low-range current-sensor abnormality. The cited bulletin excerpts describe diagnostic checks performed with the electric motor switch ON or when main-drive-battery charging starts; another excerpt specifies a check after three seconds from switch-on or charging start. The excerpts do not provide a complete P1A42 setting criterion, diagnosis, or repair procedure.
3. What system is affected?
Main Drive Lithium-ion Battery current-sensor power-supply circuit.
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
- Verified evidence identifies an abnormal power-supply circuit condition of the Main Drive Lithium-ion Battery current sensor. Further root causes are 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.
9. What you can safely do
- Arrange diagnosis by a Mitsubishi-qualified EV service facility.
- Do not attempt high-voltage battery or current-sensor circuit repair yourself.
10. Step-by-step troubleshooting
- A qualified technician can use Mitsubishi diagnostic information applicable to the vehicle to evaluate P1A42.
- The supplied bulletin excerpts place related current-sensor diagnostic checks around electric-motor-switch ON and the start of main-drive-battery charging. They do not establish a complete owner-performed troubleshooting procedure.
11. When to contact service
Service need is not yet established by verified evidence; however, diagnosis by a Mitsubishi-qualified EV service facility is appropriate because this code concerns the main drive lithium-ion battery current-sensor power-supply circuit.
12. What the service center may check
- Verify P1A42 using Mitsubishi diagnostic procedures applicable to the vehicle.
- Evaluate the Main Drive Lithium-ion Battery current-sensor power-supply circuit using approved manufacturer procedures.
- Consider related current-sensor DTC status where required by the applicable diagnostic procedure: P1A40 and P1A41.
13. Possible repair or resolution
- 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: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf
- Mitsubishi TSB-19-54-004, published March 13, 2019; NHTSA manufacturer communication MC-10158409: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158409-9999.pdf
- Mitsubishi TSB-19-54-005, published March 13, 2019; NHTSA manufacturer communication MC-10158410: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158410-9999.pdf
16. Recall information
No recall relationship is established by verified evidence.
17. Official manufacturer information
Verified applicability: U.S.-market Mitsubishi i-MiEV model years 2012, 2014, and 2016. No recall information was supplied in the verified evidence.
19. Frequently asked questions
What does P1A42 mean?
Verified Mitsubishi bulletin evidence identifies P1A42 as an abnormal power-supply circuit condition for the Main Drive Lithium-ion Battery current sensor.
Can I drive with P1A42?
Not yet established by verified evidence.
Can I charge with P1A42?
Not yet established by verified evidence.
Which vehicles are verified as applicable?
The supplied verified applicability data identifies U.S.-market Mitsubishi i-MiEV vehicles from model years 2012, 2014, and 2016.