Honda U357A
If all of these DTCs are NOT SET as current or history, this bulletin does not apply; continue wi
Quick answer
U357A is listed in Honda Service Bulletin A25-043 as one of a required group of DTCs for a specific inspection and repair procedure on certain 2024–2025 Honda Prologue vehicles in the US. The bulletin applies only when all listed DTCs are set as current or history.
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1. What does U357A mean?
U357A is listed in Honda Service Bulletin A25-043 as one of a required group of DTCs for a specific inspection and repair procedure on certain 2024–2025 Honda Prologue vehicles in the US. The bulletin applies only when all listed DTCs are set as current or history.
2. Technical explanation
The verified evidence does not provide a standalone component definition for U357A. It states that technicians must verify all of these DTCs are set: P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, and U35AF. If all are not present as current or history, Bulletin A25-043 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 U357A.
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 vehicle evaluated by a Honda dealer or qualified service facility if U357A is present.
- Do not assume Bulletin A25-043 applies based on U357A alone; the bulletin requires the complete listed DTC set as current or history.
10. Step-by-step troubleshooting
- A technician should check whether P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, and U35AF are all stored as current or history.
- If the complete DTC set is not present, the verified bulletin evidence says A25-043 does not apply.
11. When to contact service
Contact a Honda dealer or qualified service facility for diagnosis. Provide DTC U357A and ask whether Honda Service Bulletin A25-043 applies to the vehicle.
12. What the service center may check
- Verify the presence of all DTCs specified in Honda Service Bulletin A25-043 as current or history: P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, and U35AF.
13. Possible repair or resolution
- The supplied verified evidence confirms that Bulletin A25-043 contains inspection and repair procedures, but it does not provide the actual repair steps. Not yet established by verified evidence.
14. Affected vehicles
- Honda Prologue · 2024–2025 · US
15. Related TSBs / service bulletins
- Honda Service Bulletin A25-043, published May 23, 2025; NHTSA Manufacturer Communication PDF 11019250. Applicable evidence covers 2024–2025 Honda Prologue vehicles in the US, subject to the bulletin's required DTC conditions.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Official source: NHTSA Manufacturer Communication PDF 11019250, Honda Service Bulletin A25-043: https://static.nhtsa.gov/odi/tsbs/2025/MC-11019250-0001.pdf
19. Frequently asked questions
What does U357A mean on a Honda Prologue?
The supplied verified evidence does not define U357A as a standalone fault. It identifies U357A as one member of a required DTC group in Honda Service Bulletin A25-043.
Does Honda Service Bulletin A25-043 apply if only U357A is stored?
No. The bulletin evidence says all listed DTCs must be set as current or history; otherwise, the bulletin does not apply.
Which vehicles are covered by the verified bulletin evidence?
The supplied applicability evidence identifies US-market 2024–2025 Honda Prologue vehicles.