Mitsubishi P1A26
ECU. Q: Is the DTC stored? YES : Carry out troubleshooting for the DTC. NO : Go to Step 11. ACC07057 AE Harness side Charging contactor connector C-22 (GR) Intermediate connector (
Quick answer
P1A26 is documented in Mitsubishi diagnostic material for certain US i-MiEV vehicles. The supplied evidence identifies it as an EV-ECU DTC referenced during charging-contactor troubleshooting, but does not establish a plain-language fault definition, vehicle symptoms, driving safety, charging safety, or a complete repair path for P1A26 alone.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
Watch Videos
Relevant videos play here without leaving this diagnostic page.
No sufficiently relevant embeddable video has been accepted for this diagnostic yet.
Videos are supporting material and never override OEM or regulator evidence.
1. What does P1A26 mean?
P1A26 is documented in Mitsubishi diagnostic material for certain US i-MiEV vehicles. The supplied evidence identifies it as an EV-ECU DTC referenced during charging-contactor troubleshooting, but does not establish a plain-language fault definition, vehicle symptoms, driving safety, charging safety, or a complete repair path for P1A26 alone.
2. Technical explanation
In the supplied Mitsubishi service-bulletin excerpts, technicians use scan tool MB991958 to check the EV-ECU for DTCs. The procedure asks whether any DTC other than P0AE7, P1A16, or P1A26 is stored. If another DTC is stored, the instruction is to troubleshoot that DTC; if not, proceed to Step 11. The excerpts also state that, at an earlier decision point, replacement of the charging contactor in the Main Drive Lithium-ion Battery is instructed when that specific preceding test result is NO. The supplied excerpts do not show the complete P1A26 diagnostic procedure or establish that the contactor replacement applies to every P1A26 occurrence.
3. What system is affected?
EV-ECU and the Main Drive Lithium-ion Battery charging-contactor diagnostic procedure are referenced by the verified evidence.
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
- Not yet established by verified evidence. The supplied excerpts do not identify a specific root cause for P1A26.
- The verified procedure references charging-contactor troubleshooting and a charging contactor within the Main Drive Lithium-ion Battery, but does not establish this as the cause of P1A26 in every case.
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
- Have the EV-ECU checked with the specified scan tool or equivalent manufacturer-capable diagnostic equipment by qualified service personnel.
- Record all stored EV-ECU DTCs; the verified procedure specifically distinguishes P0AE7, P1A16, and P1A26 from other stored codes.
- Do not attempt high-voltage battery or charging-contactor repair yourself.
10. Step-by-step troubleshooting
- Use scan tool MB991958 to check whether EV-ECU DTCs other than P0AE7, P1A16, or P1A26 are stored.
- If another EV-ECU DTC is stored, the supplied procedure directs the technician to troubleshoot that DTC.
- If no DTC other than P0AE7, P1A16, or P1A26 is stored, the supplied procedure directs the technician to proceed to Step 11. The content of Step 11 is not included in the verified evidence.
- The supplied excerpts reference connector C-22, an intermediate connector, and the EV-ECU, but do not provide enough complete procedure detail to prescribe inspection or repair actions.
11. When to contact service
Service is appropriate because P1A26 is an EV-ECU DTC referenced in a Main Drive Lithium-ion Battery charging-contactor diagnostic procedure. The supplied evidence does not establish urgency or whether the vehicle can be driven or charged.
12. What the service center may check
- Retrieve and document all EV-ECU DTCs using scan tool MB991958, as specified in the verified procedure.
- Determine whether any stored EV-ECU DTC is present other than P0AE7, P1A16, or P1A26.
- Follow the complete applicable Mitsubishi diagnostic procedure, including the unavailable Step 11 and any preceding decision steps.
13. Possible repair or resolution
- Not yet established by verified evidence for P1A26 alone.
- The supplied excerpts state that replacement of the charging contactor in the Main Drive Lithium-ion Battery is required following a particular preceding NO result, but that preceding test and its applicability to an individual P1A26 diagnosis are not fully provided.
14. Affected vehicles
- Mitsubishi i-MiEV · 2012 · US
- Mitsubishi i-MiEV · 2014 · US
15. Related TSBs / service bulletins
- Mitsubishi TSB-19-54-004, published March 13, 2019; available through NHTSA as Manufacturer Communication 10158409: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158409-9999.pdf
- Mitsubishi TSB-19-54-003, published March 13, 2019; available through NHTSA as Manufacturer Communication 10158408: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf
16. Recall information
No recall relationship is established by verified evidence.
17. Official manufacturer information
Verified official evidence consists of two NHTSA-hosted Mitsubishi manufacturer communications: TSB-19-54-003 and TSB-19-54-004, both published March 13, 2019. They contain an EV-ECU DTC-check step that specifically names P1A26 alongside P0AE7 and P1A16.
19. Frequently asked questions
What does P1A26 mean on a Mitsubishi i-MiEV?
The supplied evidence does not establish a complete plain-language definition. It establishes that P1A26 is an EV-ECU DTC referenced in Mitsubishi charging-contactor diagnostic material.
Which vehicles are covered by the verified evidence?
2012 and 2014 Mitsubishi i-MiEV vehicles in the US market are listed in the supplied applicability evidence.
Does P1A26 mean the charging contactor must be replaced?
Not necessarily. The supplied excerpts direct charging-contactor replacement after a particular earlier NO test result, but do not provide enough of the procedure to establish that replacement is required for every P1A26.
Can I drive or charge with P1A26?
Not yet established by verified evidence.