Mitsubishi P0780
23-002 has been applied to the vehicle or the SCU software is already at the new version, it is not necessary to perform this bulletin. AFFECTED VEHICLES Certa in 2022-2023 Outland
Quick answer
Verified evidence links P0780 to a Mitsubishi service communication involving a possible TCM/SCU software-version mismatch after TCM replacement and update. The supplied source says the vehicle can become undrivable if a temporary inhibitor-switch continuity fault occurs while operating the gear selector.
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 P0780 mean?
Verified evidence links P0780 to a Mitsubishi service communication involving a possible TCM/SCU software-version mismatch after TCM replacement and update. The supplied source says the vehicle can become undrivable if a temporary inhibitor-switch continuity fault occurs while operating the gear selector.
2. Technical explanation
NHTSA Manufacturer Communication TIN-23-00-003 states that, on a vehicle with older SCU software, replacement and software updating of the TCM can create a mismatch between TCM and SCU software. If a temporary continuity fault of the inhibitor switch occurs while operating the gear selector in that situation, DTCs P0780 and P0706 can appear and the vehicle can become undrivable. The communication also states that its bulletin procedure is unnecessary if TSB-23-23-002 has already been applied or the SCU already has the newer software version.
3. What system is affected?
The verified source references the transmission control module (TCM), software control unit (SCU), inhibitor switch, and gear-selector operation. A formal system name is not provided in the supplied diagnostic record.
4. How serious is this code?
Unknown in the diagnostic record. However, the verified service communication identifies a scenario in which the vehicle may become undrivable.
5. Symptoms you may notice
- P0780 and P0706 may appear if the described temporary inhibitor-switch continuity fault occurs while operating the gear selector.
- The vehicle may become undrivable in the software-mismatch scenario described by the source.
6. Possible causes
- A mismatch between TCM and SCU software after TCM replacement and software updating on a vehicle with an older SCU software version.
- A temporary continuity fault of the inhibitor switch while operating the gear selector, in the scenario described by the service communication.
7. Can I still drive the vehicle?
Not yet established by verified evidence for every P0780 occurrence. The supplied source says the vehicle can still be driven in the described software-mismatch condition, but it may become undrivable if the specified inhibitor-switch continuity fault occurs.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Arrange diagnosis by a Mitsubishi service facility or qualified technician, particularly if gear selection is abnormal or the vehicle cannot be driven.
- Provide the stored DTCs and any history of TCM replacement or software updating to the service provider.
- Do not attempt high-voltage or module repair procedures based on this information.
10. Step-by-step troubleshooting
- Confirm whether the vehicle is within the affected vehicle population stated by the communication.
- Verify whether TSB-23-23-002 has already been applied or whether the SCU software is already at the newer version.
- Have service personnel assess the TCM/SCU software relationship and the inhibitor-switch continuity condition described in the communication.
11. When to contact service
Contact Mitsubishi service or a qualified technician if P0780 is present, especially if there is a gear-selector concern or the vehicle becomes undrivable.
12. What the service center may check
- Check whether the TCM was replaced and software updated.
- Check SCU software version and whether TSB-23-23-002 was applied.
- Assess for the temporary inhibitor-switch continuity fault described in TIN-23-00-003.
- Review the presence of P0780 and P0706.
13. Possible repair or resolution
- The supplied evidence indicates that the bulletin procedure is not necessary when TSB-23-23-002 has already been applied or the SCU software is already at the newer version.
- The exact repair procedure is not established by the supplied evidence.
14. Affected vehicles
- Mitsubishi i-MiEV · 2012–2017 · US
15. Related TSBs / service bulletins
- NHTSA Manufacturer Communication PDF 10234017: TIN-23-00-003, published March 14, 2023. It references TSB-23-23-002 and discusses TCM/SCU software mismatch, P0780/P0706, and potential loss of drivability.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Official source: NHTSA Manufacturer Communication PDF 10234017, Mitsubishi TIN-23-00-003: https://static.nhtsa.gov/odi/tsbs/2023/MC-10234017-0001.pdf
19. Frequently asked questions
What does the supplied Mitsubishi evidence say about P0780?
It says P0780 and P0706 may appear when a temporary inhibitor-switch continuity fault occurs during gear-selector operation in a described TCM/SCU software-mismatch situation.
Can the vehicle be driven with this condition?
The source says the vehicle can still be driven in the described mismatch condition, but it may become undrivable if the specified temporary inhibitor-switch continuity fault occurs.
Is this bulletin always needed?
No. The source states it is not necessary if TSB-23-23-002 has already been applied or the SCU software is already at the new version.
Does this evidence establish charging effects?
No. Charging effects are not yet established by verified evidence.