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Toyota P0A94

The warning lights and stored hybrid system DTCs can be triggered due to conditions detected

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact an authorized Toyota dealer if you believe the vehicle has experienced this condition. Toyota's program FAQ specifically directs owners who think they have experienced the condition to contact an authorized Toyota dealer.
Confidence95%

Quick answer

For certain U.S. Toyota Prius vehicles, P0A94 is listed in Toyota Customer Support Program materials as a hybrid-system DTC associated with failure of the IPM and potentially other internal inverter components. Toyota advises owners who believe they have experienced the covered condition to contact an authorized Toyota dealer.

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

Video guides

Watch Videos

Relevant videos play here without leaving this diagnostic page.

DTC Toyota P0A94-589 Short ExplanationMaxidot Dodge
DTC Toyota P0A94-587 Short ExplanationMaxidot Dodge
DTC Toyota P0A94-585 Short ExplanationMaxidot Dodge

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

1. What does P0A94 mean?

For certain U.S. Toyota Prius vehicles, P0A94 is listed in Toyota Customer Support Program materials as a hybrid-system DTC associated with failure of the IPM and potentially other internal inverter components. Toyota advises owners who believe they have experienced the covered condition to contact an authorized Toyota dealer.

2. Technical explanation

Verified Toyota/NHTSA manufacturer communication evidence identifies P0A94 as one of the hybrid-system DTCs used in Customer Support Program 20TE10 and later 23TE03 materials. When P0A94 is present, the program materials state that coverage applies to IPM failure and other internal inverter components potentially damaged by IPM failure. The later 23TE03 materials describe 20-year coverage with no mileage limitation from the date of first use for the listed condition, subject to the program terms and eligibility.

3. What system is affected?

Hybrid-system inverter assembly, including the intelligent power module (IPM) and potentially other internal inverter components.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • P0A94 may be present as a hybrid-system diagnostic trouble code.
  • Additional owner-observable symptoms are not yet established by verified evidence.

6. Possible causes

  • Toyota program materials associate P0A94 with IPM failure and potentially damaged internal inverter components.
  • The specific root cause for an individual vehicle is not yet 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 evaluation by an authorized Toyota dealer if P0A94 is present or the covered condition is suspected.
  • Provide the dealer with the stored DTC and ask them to check Customer Support Program eligibility.
  • Do not attempt high-voltage inverter or IPM repairs yourself.

10. Step-by-step troubleshooting

  1. Have an authorized Toyota dealer retrieve and confirm diagnostic trouble codes.
  2. Ask the dealer to determine whether the vehicle and condition qualify under the applicable Toyota Customer Support Program.
  3. Further diagnostic procedure details are not established by the supplied verified evidence.

11. When to contact service

Contact an authorized Toyota dealer if you believe the vehicle has experienced this condition. Toyota's program FAQ specifically directs owners who think they have experienced the condition to contact an authorized Toyota dealer.

12. What the service center may check

  • Confirm whether P0A94 is present.
  • Assess the IPM and internal inverter components for the covered failure condition.
  • Verify vehicle eligibility and applicable Customer Support Program terms.

13. Possible repair or resolution

  • For qualifying vehicles and conditions, Toyota program materials state that coverage includes repair or replacement related to IPM failure and other internal inverter components potentially damaged by IPM failure.
  • The exact repair required for any individual vehicle is not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Toyota Customer Support Program 20TE10: P0A94 is listed with P324E, P3004, and P0A1A as a DTC indicating the covered condition; the program covers IPM failure and potentially damaged internal inverter components when these DTCs are present.
  • Toyota Customer Confidence Program 23TE03: identifies P0A94, P0A1A, P324E, and P3004 and describes 20-year coverage with no mileage limitation from date of first use for the stated IPM/inverter condition, subject to program terms.
  • Official NHTSA-hosted documents: https://static.nhtsa.gov/odi/tsbs/2020/MC-10182972-9999.pdf ; https://static.nhtsa.gov/odi/tsbs/2023/MC-10240055-9999.pdf ; https://static.nhtsa.gov/odi/tsbs/2023/MC-10235231-9999.pdf

16. Recall information

  • No recall is established by the supplied verified evidence. The supplied documents are Toyota Customer Support/Confidence Program communications.

17. Official manufacturer information

Applicable verified evidence concerns U.S. Toyota Prius model years 2012–2015. Confirm eligibility, coverage status, and required repair with an authorized Toyota dealer using the vehicle identification number (VIN).

19. Frequently asked questions

What does P0A94 mean in the supplied Toyota program evidence?

Toyota identifies P0A94 as one of the hybrid-system DTCs associated with IPM failure and potentially damaged internal inverter components under its customer support program materials.

What should an owner do?

Toyota's FAQ says that an owner who thinks they have experienced the covered condition should contact an authorized Toyota dealer.

Is there extended coverage?

The supplied 23TE03 evidence describes 20-year coverage with no mileage limitation from the date of first use for the stated condition, subject to Toyota program terms and vehicle eligibility.

Is P0A94 a recall?

Not based on the supplied evidence. The documents are identified as Toyota Customer Support/Confidence Program communications, not recall notices.

20. Sources & verification

ReferenceVerified
Toyota P0A94: The warning lights and stored hybrid system DTCs can be… | EV Diagnostics