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Mitsubishi P1A15

ECU. Q: Is the DTC stored? YES : Carry out troubleshooting for the DTC. NO : Go to Step 4. STEP 4. High-voltage fuse No.1 (Main,280A) (Main Drive Lithium-ion Battery assembly) chec

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Mitsubishi dealer or a qualified EV service facility for diagnosis using the applicable Mitsubishi P1A15 procedure.
Confidence95%

Quick answer

P1A15 is identified in Mitsubishi service information as “High-voltage system error (1).” Verified Mitsubishi TSB information replaces the diagnostic procedure for this DTC on specified i-MiEV vehicles.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

Video guides

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P1A15 ERROR Inverter MCU - Mitsubishi i-MIEV Citroen C-Zero, Peugeot iOnBavarianSuperGuy
Mitsubishi i-MiEV Troubleshooting P1A15 using the CAN bridgeMsEdzus

Videos are supporting material and never override OEM or regulator evidence.

1. What does P1A15 mean?

P1A15 is identified in Mitsubishi service information as “High-voltage system error (1).” Verified Mitsubishi TSB information replaces the diagnostic procedure for this DTC on specified i-MiEV vehicles.

2. Technical explanation

The verified procedure includes clearing the stored DTC, cycling the electric motor switch, and checking whether P1A15 returns. It also directs use of scan tool MB991958 to check for DTCs in other systems. If another-system DTC is stored, Mitsubishi directs diagnosis of that DTC first. If not, the procedure proceeds to a check of high-voltage fuse No. 1 (Main, 280A) in the main drive lithium-ion battery assembly. High-voltage diagnosis and fuse service must be performed by qualified personnel using the applicable Mitsubishi procedure.

3. What system is affected?

High-voltage system; EV-ECU; main drive lithium-ion battery assembly; high-voltage fuse No. 1 (Main, 280A).

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 related DTC in another system may be present; Mitsubishi directs troubleshooting of that DTC when found.
  • The Mitsubishi diagnostic procedure includes inspection of high-voltage fuse No. 1 (Main, 280A) in the main drive lithium-ion battery assembly. The evidence does not establish a failed fuse as the cause in every P1A15 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

  • Arrange diagnosis by a Mitsubishi-qualified EV service facility.
  • Do not attempt to inspect, remove, replace, or otherwise service high-voltage components or the main drive battery fuse yourself.

10. Step-by-step troubleshooting

  1. A technician clears the stored DTC, cycles the electric motor switch as specified, and confirms whether P1A15 returns.
  2. If P1A15 returns, the technician uses scan tool MB991958 to check for DTCs in other systems.
  3. If P1A15 is present in another system, Mitsubishi directs troubleshooting for that DTC.
  4. If no other-system P1A15 is present, the Mitsubishi procedure proceeds to inspection of high-voltage fuse No. 1 (Main, 280A) in the main drive lithium-ion battery assembly.

11. When to contact service

Contact a Mitsubishi dealer or a qualified EV service facility for diagnosis using the applicable Mitsubishi P1A15 procedure.

12. What the service center may check

  • Confirm whether P1A15 is stored or set after the specified reset/cycle procedure.
  • Check for DTCs in other systems with scan tool MB991958.
  • Check high-voltage fuse No. 1 (Main, 280A) in the main drive lithium-ion battery assembly, following Mitsubishi high-voltage safety procedures.

13. Possible repair or resolution

  • If the high-voltage fuse No. 1 check result is not normal, the cited Mitsubishi procedure directs replacement of high-voltage fuse No. 1 (Main, 280A).
  • If another-system DTC is found, Mitsubishi directs troubleshooting for that DTC.
  • Any final repair beyond these documented directions is not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • TSB-14-54-012: Replaces diagnostic procedures for DTC P1A15 High Voltage System Error (1) for 2014 Mitsubishi i-MiEV.
  • TSB-15-54-003: Replaces diagnostic procedures for DTC P1A15 High-voltage system error (1); evidence identifies 2012–2013 i-MiEV applicability.
  • TSB-19-54-003: Documents a P1A15 diagnostic sequence including other-system DTC checking and high-voltage fuse No. 1 inspection.
  • TSB-19-54-004: Documents a P1A15 diagnostic sequence including other-system DTC checking and high-voltage fuse No. 1 inspection.
  • TSB-19-54-005: Documents a P1A15 diagnostic sequence and warns that the service plug must be removed to shut down high voltage when servicing high-voltage components.

16. Recall information

No recall relationship is established by verified evidence.

17. Official manufacturer information

Verified NHTSA-hosted Mitsubishi manufacturer communications include TSB-14-54-012, TSB-15-54-003, TSB-19-54-003, TSB-19-54-004, and TSB-19-54-005. No recall is established by the supplied evidence.

19. Frequently asked questions

What does Mitsubishi P1A15 mean?

The supplied Mitsubishi TSB evidence identifies P1A15 as “High-voltage system error (1).”

Which vehicles are supported by the supplied applicability data?

Mitsubishi i-MiEV vehicles in the US for model years 2012, 2013, 2014, and 2016. The supplied data also includes a 2012–2013 applicability entry.

Can I replace the 280A high-voltage fuse myself?

No self-service instruction is supported by the evidence. The cited procedure concerns high-voltage components and includes a danger warning concerning shutdown of high voltage during service.

Does P1A15 always mean the main battery fuse has failed?

No. The verified procedure first checks for DTCs in other systems and directs troubleshooting of any such DTC. Fuse inspection is a subsequent diagnostic step.

20. Sources & verification

Verified
Mitsubishi P1A15: ECU. Q: Is the DTC stored? YES : Carry out… | EV Diagnostics