Honda U3578
If all of these DTCs are NOT SET as current or history, this bulletin does not appl
Quick answer
U3578 is referenced in Honda Service Bulletin A25-043 only as part of a required group of DTCs. The bulletin applies only when all listed DTCs are set as current or history.
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 referenced in Honda Service Bulletin A25-043 only as part of a required group of DTCs. The bulletin applies only when all listed DTCs are set as current or history.
2. Technical explanation
Verified evidence does not provide a standalone technical definition for U3578. Honda bulletin A25-043 states that the vehicle must have all of the following DTCs set as current or history for the bulletin to apply: P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, and U35AF. If all of these DTCs are not set as current or history, the bulletin does not apply.
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 level 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 the stored and current DTC status checked using appropriate Honda diagnostic procedures.
- Confirm whether every DTC required by Honda bulletin A25-043 is present as current or history before applying that bulletin.
10. Step-by-step troubleshooting
- Verify whether P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, and U35AF are all set as current or history.
- If all required DTCs are not set as current or history, Honda bulletin A25-043 does not apply.
11. When to contact service
Service evaluation may be appropriate to verify DTC status and determine whether Honda bulletin A25-043 applies. No urgency level is established by the supplied evidence.
12. What the service center may check
- Check current and history status for P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, and U35AF.
- Use Honda bulletin A25-043 only when all listed DTCs are set as current or history.
13. Possible repair or resolution
- Not yet established by verified evidence. The supplied bulletin excerpt provides an applicability condition but does not provide the repair procedure.
14. Affected vehicles
- Honda Prologue · 2024–2025 · US
15. Related TSBs / service bulletins
- Honda Service Bulletin A25-043, published May 23, 2025, is documented by NHTSA Manufacturer Communication PDF 11019250. It applies only if P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, and U35AF are all set as current or history.
16. Recall information
No recall relationship is established by verified evidence.
17. Official manufacturer information
Official source: NHTSA Manufacturer Communication PDF 11019250, Honda Service Bulletin A25-043, published May 23, 2025: https://static.nhtsa.gov/odi/tsbs/2025/MC-11019250-0001.pdf
19. Frequently asked questions
What does U3578 mean?
A standalone meaning for U3578 is not established by the supplied verified evidence. It is listed as one of the required DTCs in Honda bulletin A25-043.
Does Honda bulletin A25-043 apply when U3578 alone is present?
No. The verified bulletin excerpt says all listed DTCs must be set as current or history; U3578 alone does not meet that stated condition.
Which vehicles are covered by the supplied evidence?
The verified applicability data identifies U.S.-market 2024-2025 Honda Prologue vehicles.