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Mitsubishi P1A70

ion batt

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService is recommended because the verified bulletin directs a diagnostic outcome involving either the main drive lithium-ion battery cooling fan or wiring harness. A qualified Mitsubishi EV technician should perform the bulletin procedure.
Confidence95%

Quick answer

For a 2016 US Mitsubishi i-MiEV, DTC P1A70 is identified in Mitsubishi TSB-19-54-005 as “CMU07 Battery Temperature.”

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 P1A70 mean?

For a 2016 US Mitsubishi i-MiEV, DTC P1A70 is identified in Mitsubishi TSB-19-54-005 as “CMU07 Battery Temperature.”

2. Technical explanation

The verified Mitsubishi/NHTSA bulletin groups P1A70 with main-drive lithium-ion battery temperature DTCs for CMU01 through CMU12. P1A70 specifically corresponds to CMU07 Battery Temperature. The bulletin’s listed trouble-judgment timing includes approximately 3 seconds after the electric motor switch is turned ON, or 3 seconds after the main drive lithium-ion battery-related condition described in the bulletin. The supplied evidence does not establish the exact fault threshold, sensor circuit condition, or a consumer-facing definition beyond CMU07 Battery Temperature.

3. What system is affected?

Main drive lithium-ion battery temperature monitoring; specifically CMU07, based on the verified TSB.

4. How serious is this code?

Unknown. The supplied verified evidence does not assign a severity level.

5. Symptoms you may notice

  • Not yet established by verified evidence.

6. Possible causes

  • The verified TSB diagnostic path distinguishes between a cooling-fan replacement outcome and a wiring-harness repair outcome after its specified check result.
  • The supplied evidence does not establish a complete root-cause list or identify which condition applies to an individual vehicle.

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 provider.
  • Do not attempt high-voltage battery, battery cooling-fan, or wiring-harness repairs yourself.
  • Record the DTC and any instrument-panel warnings for the service appointment.

10. Step-by-step troubleshooting

  1. Mitsubishi TSB-19-54-005 provides a diagnostic decision path for P1A70 and related CMU battery-temperature DTCs.
  2. According to the supplied bulletin evidence, a normal result in the referenced check leads to replacement of the cooling fan in the main drive lithium-ion battery.
  3. According to the supplied bulletin evidence, a non-normal result leads to wiring-harness repair.
  4. The specific check procedure and full diagnostic criteria are not included in the supplied evidence summary.

11. When to contact service

Service is recommended because the verified bulletin directs a diagnostic outcome involving either the main drive lithium-ion battery cooling fan or wiring harness. A qualified Mitsubishi EV technician should perform the bulletin procedure.

12. What the service center may check

  • Confirm DTC P1A70 is present.
  • Follow the P1A70 diagnostic procedure in Mitsubishi TSB-19-54-005.
  • Perform the bulletin’s referenced check to determine whether the result is normal or non-normal.
  • If the check result is normal, the bulletin directs replacement of the cooling fan in the main drive lithium-ion battery.
  • If the check result is non-normal, the bulletin directs wiring-harness repair.

13. Possible repair or resolution

  • Replace the cooling fan in the main drive lithium-ion battery when the specified check result is normal, as directed by TSB-19-54-005.
  • Repair the wiring harness when the specified check result is non-normal, as directed by TSB-19-54-005.
  • The supplied evidence does not establish parts numbers, labor operations, or whether either repair will apply to every P1A70 event.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA Manufacturer Communication PDF 10158410: Mitsubishi TSB-19-54-005, published March 13, 2019. It lists P1A70 as CMU07 Battery Temperature and provides a diagnostic branch leading to either main drive lithium-ion battery cooling-fan replacement or wiring-harness repair.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified official source: NHTSA-hosted Mitsubishi manufacturer communication, TSB-19-54-005 (MC-10158410), published 2019-03-13: https://static.nhtsa.gov/odi/tsbs/2019/MC-10158410-9999.pdf

19. Frequently asked questions

What does Mitsubishi P1A70 mean?

For the verified application, Mitsubishi TSB-19-54-005 identifies P1A70 as “CMU07 Battery Temperature.”

Which vehicle is verified for this code information?

The supplied applicability evidence identifies the 2016 Mitsubishi i-MiEV in the US.

What repair does the bulletin direct?

The bulletin directs replacement of the main drive lithium-ion battery cooling fan if its referenced check result is normal, or wiring-harness repair if that result is non-normal.

Is it safe to drive or charge with P1A70?

Not yet established by verified evidence.

20. Sources & verification

Verified
Mitsubishi P1A70: ion batt | EV Diagnostics