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Honda U3577

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

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Honda dealer or qualified service facility for diagnosis, particularly to determine whether the complete DTC set required by Honda bulletin A25-043 is present.
Confidence95%

Quick answer

For 2024–2025 Honda Prologue vehicles in the US, U3577 is listed in Honda bulletin A25-043 only as part of a required group of DTCs. The supplied evidence does not establish a standalone meaning, cause, symptom, drivability status, charging status, or repair for U3577 alone.

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 U3577 mean?

For 2024–2025 Honda Prologue vehicles in the US, U3577 is listed in Honda bulletin A25-043 only as part of a required group of DTCs. The supplied evidence does not establish a standalone meaning, cause, symptom, drivability status, charging status, or repair for U3577 alone.

2. Technical explanation

NHTSA-hosted Honda manufacturer communication A25-043 instructs technicians to verify that all of the following DTCs are set, either current or history: P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, and U35AF. The supplied bulletin excerpt states that if all of these DTCs are not set as current or history, the bulletin does not apply. The excerpt does not provide the complete standalone definition of U3577.

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 U3577.

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 a Honda dealer or qualified service facility confirm whether U3577 is current or stored as history and whether every DTC required by bulletin A25-043 is present.
  • Do not assume bulletin A25-043 applies when U3577 is the only identified code; the supplied evidence requires the complete listed DTC group.

10. Step-by-step troubleshooting

  1. Check for P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, and U35AF as current or history codes.
  2. If any code in that required group is not set as current or history, the supplied excerpt says bulletin A25-043 does not apply.
  3. Further diagnostic steps are not established by the supplied verified evidence.

11. When to contact service

Contact a Honda dealer or qualified service facility for diagnosis, particularly to determine whether the complete DTC set required by Honda bulletin A25-043 is present.

12. What the service center may check

  • Verify whether all required DTCs are set as current or history: P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, and U35AF.
  • Determine bulletin applicability based on that complete DTC set.

13. Possible repair or resolution

  • Not yet established by verified evidence. The supplied excerpt references inspection and repair procedures but does not include the actual repair details.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Honda bulletin A25-043, published May 23, 2025 and hosted by NHTSA as Manufacturer Communication PDF 11019250, applies only when all listed DTCs are set as current or history according to the supplied excerpt.
  • Applicable vehicle population in the supplied data: 2024–2025 Honda Prologue, US.

16. Recall information

  • No recall information was supplied or established by verified evidence.

17. Official manufacturer information

Official source: NHTSA Manufacturer Communication PDF 11019250, Honda bulletin A25-043: https://static.nhtsa.gov/odi/tsbs/2025/MC-11019250-0001.pdf

19. Frequently asked questions

What does U3577 mean on a 2024–2025 Honda Prologue?

The supplied verified evidence does not provide a complete standalone meaning for U3577. It identifies U3577 as one of several DTCs required for Honda bulletin A25-043 to apply.

Does Honda bulletin A25-043 apply if only U3577 is present?

No. The supplied bulletin excerpt says all listed DTCs must be set as current or history; otherwise, the bulletin does not apply.

Which codes must accompany U3577 for bulletin A25-043?

P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, and U35AF must all be set as current or history.

20. Sources & verification

Accepted ResearchVerified
Honda U3577: If all of these DTCs are NOT SET as current or history,… | EV Diagnostics