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Acura U357C

If all of these DTCs are NOT SET as current or history this bulletin does not apply; continue wit

DriveUnknown. The supplied verified evidence does not state whether the vehicle is safe to drive with U357C.
ChargeUnknown. The supplied verified evidence does not state whether the vehicle is safe to charge with U357C.
ServiceContact an Acura dealer or qualified Acura service provider for diagnosis, particularly to determine whether the complete B25-025 DTC set is present as current or history.
Confidence95%

Quick answer

U357C is listed in Acura bulletin B25-025 only as one member of a required group of DTCs. The bulletin applies only when all listed DTCs are set as current or history; U357C alone does not establish that the bulletin applies.

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 U357C mean?

U357C is listed in Acura bulletin B25-025 only as one member of a required group of DTCs. The bulletin applies only when all listed DTCs are set as current or history; U357C alone does not establish that the bulletin applies.

2. Technical explanation

Verified evidence identifies U357C in the inspection criteria for Acura bulletin B25-025. The bulletin directs technicians 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. If all of these DTCs are not set as current or history, the bulletin does not apply. The supplied evidence does not establish a standalone technical definition for U357C.

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 U357C.

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?

Unknown. The supplied verified evidence does not state whether the vehicle is safe to drive with U357C.

8. Can I charge the vehicle?

Unknown. The supplied verified evidence does not state whether the vehicle is safe to charge with U357C.

9. What you can safely do

  • Have a qualified Acura service provider check for current and history DTCs.
  • Confirm whether every DTC required by bulletin B25-025 is present before treating that bulletin as applicable.
  • Do not assume U357C by itself identifies the fault or repair.

10. Step-by-step troubleshooting

  1. Verify whether the following DTCs are all set as current or history: P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, U357F, U3580, and U35AF.
  2. If all listed DTCs are not set as current or history, bulletin B25-025 does not apply, according to the verified bulletin summary.
  3. Further diagnostic steps are not established by the supplied verified evidence.

11. When to contact service

Contact an Acura dealer or qualified Acura service provider for diagnosis, particularly to determine whether the complete B25-025 DTC set is present as current or history.

12. What the service center may check

  • Check for current and history DTCs.
  • Determine whether all DTCs specified in Acura bulletin B25-025 are set.
  • Review bulletin B25-025 if the complete required DTC set is present.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Acura bulletin B25-025, published through NHTSA as Manufacturer Communication PDF 11019256 on May 23, 2025, applies only when all required DTCs are set as current or history. U357C is one of the required DTCs.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

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 U357C mean on a 2024 Acura ZDX?

The supplied verified evidence does not provide a standalone definition for U357C. It identifies U357C as one DTC in the required DTC group for Acura bulletin B25-025.

Does bulletin B25-025 apply if only U357C is present?

No. The verified bulletin summary states that all listed DTCs must be set as current or history; otherwise the bulletin does not apply.

Which vehicles are covered by the supplied evidence?

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

20. Sources & verification

Verified
Acura U357C: If all of these DTCs are NOT SET as current or history… | EV Diagnostics