Acura U357B
If all of these DTCs are NOT SET as current or history this bulletin does not apply; conti
Quick answer
For a 2024 Acura ZDX in the United States, U357B is listed in Acura service bulletin B25-025 only as part of a required group of DTCs. The bulletin applies only when all listed codes are set as current or history; U357B alone does not establish the bulletin’s applicability.
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 U357B mean?
For a 2024 Acura ZDX in the United States, U357B is listed in Acura service bulletin B25-025 only as part of a required group of DTCs. The bulletin applies only when all listed codes are set as current or history; U357B alone does not establish the bulletin’s applicability.
2. Technical explanation
Verified NHTSA manufacturer communication B25-025 instructs technicians to verify that the vehicle has all of the following DTCs set: P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, U357F, U3580, and U35AF. The source states that if all of these DTCs are not set as current or history, the bulletin does not apply. The supplied evidence does not define a standalone fault meaning for U357B.
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 U357B.
5. Symptoms you may notice
Not yet established by verified evidence.
6. Possible causes
Not yet established by verified evidence. A diagnostic identifier alone is not proof that a specific component has failed.
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 confirm whether U357B and every other DTC required by bulletin B25-025 are present as current or history.
- Do not treat U357B by itself as confirmation that bulletin B25-025 applies.
10. Step-by-step troubleshooting
- Verify the presence of all required DTCs: P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, U357F, U3580, and U35AF.
- If every listed DTC is not set as current or history, bulletin B25-025 does not apply, according to the verified source.
11. When to contact service
Contact an Acura dealer or qualified service provider to verify the complete DTC set and determine whether Acura bulletin B25-025 applies.
12. What the service center may check
- Check whether all DTCs required by bulletin B25-025 are stored as current or history.
- Confirm the vehicle is a 2024 Acura ZDX for U.S. applicability based on the supplied record.
13. Possible repair or resolution
Not yet established by verified evidence.
14. Affected vehicles
- Acura ZDX · 2024 · US
15. Related TSBs / service bulletins
- Acura bulletin B25-025, published in an NHTSA manufacturer communication dated May 23, 2025, includes U357B in a required DTC group. The supplied evidence states that the bulletin does not apply unless all listed DTCs are 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 11019256, Acura bulletin B25-025: https://static.nhtsa.gov/odi/tsbs/2025/MC-11019256-0001.pdf
19. Frequently asked questions
What does U357B mean on a 2024 Acura ZDX?
The supplied verified evidence does not provide a standalone definition for U357B. It identifies U357B as one of several DTCs required for consideration under Acura bulletin B25-025.
Does bulletin B25-025 apply if U357B is the only code present?
No. The verified bulletin excerpt says the bulletin does not apply unless all listed DTCs are set as current or history.
Which vehicles are covered by the supplied record?
The supplied applicability record identifies 2024 Acura ZDX vehicles in the United States.