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Acura U3578

If all of these DTCs are NOT SET as current or history this bulletin

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact an Acura dealer or qualified service provider for diagnosis, particularly to determine whether the complete DTC criteria in bulletin B25-025 are met.
Confidence95%

Quick answer

U3578 is listed in Acura bulletin B25-025 for certain 2024 Acura ZDX vehicles in the United States. The bulletin applies only when U3578 is present together with every other DTC specified in the bulletin, as current or history. The supplied evidence does not establish the fault meaning of U3578 by itself.

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 U3578 mean?

U3578 is listed in Acura bulletin B25-025 for certain 2024 Acura ZDX vehicles in the United States. The bulletin applies only when U3578 is present together with every other DTC specified in the bulletin, as current or history. The supplied evidence does not establish the fault meaning of U3578 by itself.

2. Technical explanation

The verified source is NHTSA manufacturer communication 11019256, Acura bulletin B25-025, published May 23, 2025. Its inspection procedure says to verify that the vehicle has ALL of these DTCs set: P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, U357F, U3580, and U35AF. The bulletin states that if all of these DTCs are not set as current or history, the bulletin does not apply. No standalone definition for U3578 is established in the supplied verified evidence.

3. What system is affected?

Not yet established by verified evidence.

4. How serious is this code?

Unknown. The supplied verified evidence does not assign a severity to U3578.

5. Symptoms you may notice

Not yet established by verified evidence.

6. Possible causes

  • 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

  • Have an Acura dealer or qualified service provider check whether all DTCs required by bulletin B25-025 are present as current or history.
  • Do not assume bulletin B25-025 applies based on U3578 alone.

10. Step-by-step troubleshooting

  1. Retrieve current and history DTCs using appropriate diagnostic equipment.
  2. Compare the results with the complete DTC set specified in Acura bulletin B25-025: P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, U357F, U3580, and U35AF.
  3. If any of those DTCs is not set as current or history, the supplied bulletin says it does not apply.

11. When to contact service

Contact an Acura dealer or qualified service provider for diagnosis, particularly to determine whether the complete DTC criteria in bulletin B25-025 are met.

12. What the service center may check

  • Confirm vehicle applicability: 2024 Acura ZDX, United States.
  • Check for every DTC required by bulletin B25-025, as current or history.
  • Determine bulletin applicability only after confirming the complete listed DTC set.

13. Possible repair or resolution

  • Not yet established by verified evidence. The supplied excerpt confirms the bulletin's DTC-entry criteria but does not provide its repair procedure.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Acura bulletin B25-025, published May 23, 2025; NHTSA manufacturer communication 11019256. It applies only when P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, U357F, U3580, and U35AF are all set as current or history.

16. Recall information

No recall relationship is established by verified evidence.

17. Official manufacturer information

Verified official source: NHTSA Manufacturer Communication PDF 11019256, Acura bulletin B25-025, published May 23, 2025: https://static.nhtsa.gov/odi/tsbs/2025/MC-11019256-0001.pdf

19. Frequently asked questions

What does U3578 mean on a 2024 Acura ZDX?

The supplied verified evidence does not provide a standalone meaning for U3578. It lists U3578 as one member of a required group of DTCs in Acura bulletin B25-025.

Does Acura bulletin B25-025 apply if U3578 is the only code present?

No. The verified bulletin excerpt says all listed DTCs must be set as current or history; if they are not all set, the bulletin does not apply.

Which vehicles are covered by the supplied evidence?

The verified applicability record identifies 2024 Acura ZDX vehicles in the United States.

20. Sources & verification

Verified
Acura U3578: If all of these DTCs are NOT SET as current or history… | EV Diagnostics