Mitsubishi P1A44
Detecting Ground Fault . TROUBLE JUDGMENT Check Conditions 3.5 seconds elapse after the electric motor switch is turned ON, or 2 seconds elapse after the traction battery starts
Quick answer
P1A44 is a Mitsubishi i-MiEV DTC for “Detecting Ground Fault.” Verified U.S. applicability is limited to 2012, 2014, and 2016 i-MiEV models.
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 P1A44 mean?
P1A44 is a Mitsubishi i-MiEV DTC for “Detecting Ground Fault.” Verified U.S. applicability is limited to 2012, 2014, and 2016 i-MiEV models.
2. Technical explanation
The verified Mitsubishi diagnostic criteria state that P1A44 can be judged after 3.5 seconds from turning the electric motor switch ON, or 2 seconds after the main drive lithium-ion battery begins charging. It is not judged during pre-check operation or quick charging. The criterion is that a ground fault is detected for more than 5 seconds.
3. What system is affected?
The supplied evidence identifies a ground-fault diagnostic involving the main drive lithium-ion battery/BMU diagnostic process. A more specific affected subsystem is not yet established by 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
- A ground fault detected for more than 5 seconds under the stated diagnostic conditions.
- The official diagnostic flow includes wiring-harness repair when a harness check is abnormal.
- The official diagnostic flow directs BMU replacement if the diagnostic trouble code remains stored after preceding checks. Further root-cause detail is not 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 qualified Mitsubishi EV service facility.
- Do not attempt high-voltage service or remove the service plug yourself.
- Provide the stored code P1A44 and applicable vehicle year to the service facility.
10. Step-by-step troubleshooting
- Mitsubishi specifies use of scan tool MB991958 to confirm whether the DTC is set.
- The official procedure calls for P1A44 troubleshooting when the code is set.
- The diagnostic flow references wiring-harness evaluation; if that check is abnormal, the instruction is to repair the wiring harness.
- If the code remains stored after the preceding diagnostic checks, the procedure directs replacement of the BMU.
- If the code is not present at the specified decision point, the procedure identifies an intermittent malfunction and refers to Mitsubishi intermittent-malfunction guidance.
11. When to contact service
Contact a qualified Mitsubishi EV service facility for diagnosis. The cited procedure involves high-voltage vehicle precautions and specified protective equipment when removing the service plug.
12. What the service center may check
- Confirm P1A44 with Mitsubishi scan tool MB991958.
- Perform the official P1A44 diagnostic procedure.
- Inspect and evaluate the relevant wiring harness according to the service procedure.
- Determine whether P1A44 remains stored after the prescribed checks.
- Evaluate for an intermittent malfunction when the code is not set at the relevant diagnostic step.
13. Possible repair or resolution
- Repair the wiring harness when the applicable official harness check result is abnormal.
- Replace the BMU if P1A44 remains stored after the preceding official diagnostic checks.
- Handle a non-present code as an intermittent malfunction according to Mitsubishi service guidance.
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, contains P1A44 diagnostic criteria and a diagnostic flow. NHTSA document: MC-10158408-9999.
- Mitsubishi TSB-19-54-004, published March 13, 2019, contains P1A44 diagnostic criteria and directs wiring-harness repair or BMU replacement at specified diagnostic outcomes. NHTSA document: MC-10158409-9999.
- Mitsubishi TSB-19-54-005, published March 13, 2019, references P1A44 troubleshooting and high-voltage service precautions. NHTSA document: MC-10158410-9999.
16. Recall information
No recall relationship is established by verified evidence.
17. Official manufacturer information
Official NHTSA-hosted Mitsubishi manufacturer communications: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158408-9999.pdf ; https://static.nhtsa.gov/odi/tsbs/2019/MC-10158409-9999.pdf ; https://static.nhtsa.gov/odi/tsbs/2019/MC-10158410-9999.pdf
19. Frequently asked questions
What does P1A44 mean?
It means “Detecting Ground Fault” in the supplied Mitsubishi diagnostic information.
When can P1A44 set?
The verified criteria state it can be judged 3.5 seconds after the electric motor switch is turned ON, or 2 seconds after traction-battery charging begins. It is not judged during pre-check operation or quick charging.
What is the stated detection threshold?
The criterion is detection of a ground fault for more than 5 seconds.
Which vehicles are verified as applicable?
U.S.-market Mitsubishi i-MiEV model years 2012, 2014, and 2016.
Can I repair this myself?
No high-voltage repair instructions are provided here. Mitsubishi’s procedure references high-voltage precautions, service-plug removal, and specified protective equipment; use a qualified EV service facility.